Creating Value in the Gulf of Mexico

Investor Presentation January 2015

OTCQB: GSPE

2

Forward-Looking Statements

This presentation may contain forward-looking statements about the business, financial condition and prospects of the Company. Forward-looking statements can be identified by the use of forward-looking terminology such as “believes,” “projects,” “expects,” “may,” “goal,” “estimates,” “should,” “plans,” “targets,” “intends,” “could,” or “anticipates,” or the negative thereof, or other variations thereon, or comparable terminology, or by discussions of strategy or objectives. Forward-looking statements relate to anticipated or expected events, activities, and trends. Because forward-looking statements relate to matters that have not yet occurred, these statements are inherently subject to risks and uncertainties. Forward-looking statements in this presentation include, without limitation, the Company’s expectations of oil and oil equivalents, barrels of oil and gas resources, prospects leased, dollar amounts of value creation, undiscovered resources, drilling success rates, resource information, superior economics, consistent value growth and other performance results. The SEC permits oil and gas companies, in their filings with the SEC to disclose only proved, probable and possible reserves, i.e. Items 1201 through 1208 of Regulation S-K (“SEC Oil and Gas Industry Disclosures”). The estimates of recoverable resources used in this presentation do not comply with the SEC Oil and Gas Industry Disclosures, nor should it be assumed that any recoverable resources will be classified as proved, probable or possible reserves consistent with the SEC Oil and Gas Industry Disclosures. Recoverable resources estimates are undiscovered, highly speculative resources estimated where geological and geophysical data suggest the potential for discovery of petroleum but where the level of proof is insufficient for a classification as reserves or contingent resources. In addition, recoverable resources have a great amount of uncertainty as to their existence, absolute amount, and economic feasibility. Although the Company believes that the expectations reflected in forward-looking statements are reasonable, there can be no assurances that such expectations will prove to be accurate. Potential and existing shareholders are cautioned that such forward-looking statements involve risks and uncertainties. The forward-looking statements contained in thispresentation speak only as of the date of this presentation, and the Company expressly disclaims any obligation or undertaking to report any updates or revisions to any such statement to reflect any change in the Company’s expectations or any change in events, conditions or circumstances on which any such statement is based. Certain factors may cause results to differ materially from those anticipated by some of the statements made in this presentation. Please carefully review our filings with the SEC as we have identified many risk factors that impact our business plan. U.S. investors are urged to consider closely the disclosures in our Forms 10-K, 10-Q, 8-K and other filings with the SEC, which can be electronically accessed from our website at www.GulfSlope.com or the SEC's website at http://www.sec.gov/.

Abbreviations:MM Million $ United States dollarB Billion RTM Reverse time migrationBoe Barrel of oil equivalent GSPE GulfSlope Energy, Inc.EUR Estimated ultimate recovery SEC Securities and Exchange CommissionMcf Million cubic feet Tcf Trillion cubic feetNPV10 Net Present Value discounted at 10%

3

Corporate Snapshot

GulfSlope Focus Area

Shelf

Deep Water

OTCQB GSPE

Market Cap (1/21/15) $66.1 MM

Price (1/21/15) $0.10

Avg. 3 Mo. Daily Volume 200,075

Shares Outstanding 660.7 MM

Insider Ownership 40%

Established 2013

Focus Area Offshore Gulf of Mexico

Target Primarily Shelf Miocene

Seismic 2.2 MM Acres (440 Blocks)

Lease Blocks 21

Portfolio 17 Drilling Prospects

Prospective Resources 2 Billion boe recoverable

4

Investment Highlights

• 2 billion boe of net conventional recoverable resources

• 21 blocks with 17 prospects ranging from 30-280 MMboe

Significant Oil and Natural Gas Exposure

• Gulf of Mexico has some of the lowest breakeven costs in the E&P industry today

• GulfSlope’s prospects offer significant return potential in current commodity price environment

Superior Breakeven Economics

• Former Anadarko executive leadership

• Proven track record of applying technology to find oil and gas

• Specialized technical team with extensive Gulf of Mexico successWorld Class Team

• GulfSlope executive team credited for originally discovering this play

• Strategic advantage from proprietary reprocessed seismic

• Lease sale establishes GulfSlope’s leading acreage position

Leading the Redevelopment of the

Shelf Miocene

• Multiple exploration wells planned by the end of 2016

• Currently focused on pre-drill operations

• Hybrid operating model with preference to operateDrilling Program

5

• 25 years with Anadarko, most recently as CEO

• Board member of ION Geophysical

• BS Geology, MS Geology

Ron Bain, PhDPresident and COO

Clint MooreVP, Corporate Secretary

• 19 years with Anadarko

• Formerly with Sohio and Gulf Oil

• BS Physics, MS Physics, PhD Physics

• 16 years with Anadarko

• Formerly with Diamond Shamrock/Maxus, Murphy and ION Geophysical

• BA Geology, BBA Finance & Econ

• 26 years with Anadarko

• Formerly with Marubeni Oil & Gas

• BBA, Petroleum Land Management

Charles HughesVP, Land

Bill LeflerSenior Staff Geologist

Richard HeaneySenior Staff Geophysicist

• Formerly with Texaco, Mesa, BHP and Woodside

• BS Geology

• Formerly with Amoco, Sohio, BP, Conoco, Repsol and Murphy

• BS Physics, MS Geophysics

Seasoned industry professionals with unparalleled management and technical expertise lead by former Anadarko CEO

• Formerly with Mobil, McMoRan, BP, Maxus, Enron and Repsol

• BS Physics

Alex MacKeonSenior Staff Geophysicist

Terry StellmanSenior Staff Geophysicist

Kevin BainGeophysicist

• Formerly with Shell, Nippon and Vanco

• BS Geology, MS Geophysics

• Formerly with the Institute for Geophysics, Fermi National Accelerator Lab and Marathon

• BS Physics, MS Geophysics, PhD Geophysics candidate

John MalangaVP, Chief Financial Officer

• Former I-banker with Weisser, Johnson & Co., Sanders Morris Harris and Jefferies & Co.

• BS Economics, MBA Finance

John SeitzChairman and CEO

• 39 years experience • 40 years experience • 22 years experience

• 35 years experience • 35 years experience • 44 years experience

• 39 years experience • 41 years experience • 26 years experience • 7 years experience

Team In Place to Execute

• Formerly with Amoco, BP, Endeavour and Vanco

• BS Geology, MS Geophysics

Mike NeeseExploration Manager

• 36 years experience

Brady RodgersVP, Development & Engineering

• Former I-banker with JP Morgan

• Former engineer with Venoco, Endeavour and Devon

• BS Petroleum Eng, MS Energy Management

• 15 years experience

6

GulfSlope management has a track record of discovering large oil and gas fields utilizing cutting edge technology, leading to significant shareholder value creation

A History of Value Creation Through Exploration

Algeria

• 3 Billion boe discovered in early 1990s

• New seismic tools designed for the desert allowed reinterpretation of the area

• Major oil companies considered the area played-out

• Largest discovery in 32 years

Alaska

• 500 Million boe discovered in late 1980s

• Deeper horizon was visible upon further seismic analysis, which was previously untested

• Majors considered the area played-out

• 3rd largest Alaska field discovered

Gulf of Mexico

• 150 Million boe discovered in the 1990s

• Global pioneers of sub-salt exploration, which led to deepwater GoM, pre-salt Brazil, and others

• Early vintage sub-salt imaging limited potential

North Sea

• 2.4 Tcfe discovered in mid 2000s

• Exploration success based on regional seismic advantage

• Major oil companies considered the area played-out

• Early independent company entry as majors started to exit

3 Bboe 500 MMboe

150 MMboe

2.4 Tcfe

7

New Opportunities

Focus on Operations in 2015

• Pre-drilling operations started for Phase 1 prospects

• Preparing to drill as operator, which may change with partnering

Corporate Development

• Current commodity prices and simplified capital structure provides GulfSlope with unique

acquisition opportunities

• Capitalize on strategic advantages provided by exploration work to identify undervalued producing

assets

• Additional prospects identified for future lease sales with regional 3D data set of 2.2 million acres

(440 blocks)

8

3rd Party Resource Report

DeGolyer and MacNaughton reviewed GulfSlope’s 17 individual prospects:

• Average size is 120 MMboe

• Independent 3rd party evaluation of prospect sizes

• In-line with previous internal company estimates

• Consistent with deepwater Miocene evaluations discovered by major oil companies

• Prospect size range is consistent with offset discoveries from the 1990s

0

100

200

300

Mea

n P

rosp

ect

Size

Mill

ion

Bar

rels

(M

Mb

oe)

17 Prospects

Potentially recoverable resources. See company website for full DeGolyer and MacNaughton report and disclosures. Net of existing farm-out arrangements.

2 Billion barrels of prospective resources (1)

Existing Field Size Range

Graviton

Tau

Photon

TachyonOnium

5 of the 17 Prospects are Included in Phase 1 Drilling

9

$B

$1B

$2B

$3B

$4B

0% 20% 40% 60% 80% 100%

$N

PV

10

IRR

Phase 1 Drilling Program

Photon59 MMboe

Tau252 MMboe

Onium27 MMboe

Tachyon38 MMboe

Graviton247 MMboe

Individual Prospect ReturnsRisked

• GulfSlope has high-graded five prospects with mean unrisked resource potential of 623 MMboe

• Attractive returns in current commodity price environment with F&D costs of $3-$10 per boe

• Leveraged to both oil and gas weighted prospects

1/21/15 Strip Pricing

Based on DeGolyer & MacNaughton 3rd party resource estimates (see company website) and risked at estimated 40% commercial success rate. January 21, 2015 strip pricing for oil(bbl) / gas (Mcf): 2015 – $53.92/$3.22, 2016 – $60.58/$3.48, 2017 - $65.18/$3.70, 2018 - $69.35/$3.89, 2019 - $70.74/$4.07

$N

PV

10

Phase 1 Total Net Present ValueRisked

$7.8 B

$6.2 B

$1.5 B

Price High Strip LowOil (bbl) $75 1/21/15 Price $25Gas (Mcf) $5.50 1/21/15 Price $2.50

10

GulfSlopeShelf

Miocene

DeepwaterMiocene

DeepwaterL Tertiary

Oil SandsSAGD

Utica

Alaska EagleFord

Permian

Bakken Duvernay

Niobrara

$-

$25

$50

$75

$100

$125

Bre

akev

en

-$

/bb

lHow We Compare

New DeepwaterDiscoveries

Gulf of Mexico leads the North American market for lowest cost new oil production

• Previous deepwater discoveries under development benefit from significant costs spent to date, but new Deepwater Miocene fields breakeven at ~$50/boe

• GulfSlope’s full-cycle breakeven costs of $20-$25 per boe allow drilling through commodity cycles

GulfSlope range in breakeven costs vary by water depth and oil vs gas mix

Breakeven defined as neutral NPV10. GulfSlope full cycle breakeven costs estimated internally based on DeGolyer and MacNaughton audited EURs.

Wood Mackenzie’s “North American Oil Plays” October 2014

11

Accelerating Shelf Miocene Activity

Fieldwood (Riverstone)“We are re-shooting all of our large fields [with 3D seismic] to make sure that we didn’t miss anything.”

Shell“[New seismic technology] really allowed us to look underneath the salt and get a more precise image of the subsurface and the potential exploration prospect that were there.”

Apache“Discoveries on the shelf have quicker cycle times, require less capital, and provide more options to bring oil and gas to market”

“New [seismic] techniques have lead the company to previously invisible parts of the Gulf of Mexico”

“We have combined our deepwater and shelf technical teams to focus on sub-salt and other deeper exploration opportunities in water depths less than 1,000 feet, which have been relatively untested by industry.

HessConger Field doubles reserves and returns to peak production 8 years after startup utilizing new seismic technology

Noble EnergyKatmai Discovery of 40-100 MMboe, 4Q’2014

Shelf focused E&P“Today there is better definition of salt and great ability to see seismic amplitudes updip as well as hidden amplitudes underneath [salt] overhangs that previously could not be seen.” - Oct 2014

W&T OffshoreMahogany production increases 550% with benefit of drilling based on new RTM seismic

Higher ReturnShelf Miocene

Boundary

LLOG (Blackstone)20 Blocks leased in Shelf Miocene play at the 2014 Federal Lease Sale

GulfSlope Blocks in Yellow

Greater Miocene Play Prospective Throughout the AreaAuger

Tahiti

K2

Atlantis

Mad Dog

Hickory

Mahogany

Conger

Tanzanite

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Exploring a Proven Petroleum System420+ MMboe discovered in the 1990s in the Shelf Miocene sub-salt play

Conger data based on Wood Mackenzie data, other fields based on reported production to date

Enchilada >43 MMBoeDiscovered - 1995 Production - 1997

GSPE Lease BlocksPrevious Sub-Salt DiscoveriesOil and Gas-Producing Field

Mahogany >45 MMBoeDiscovered - 1993Production - 1997

Hickory 47 MMBoeDiscovered - 1998Production - 2000

Tanzanite >30 MMBoeDiscovered - 1998 Production - 1999

Conger 243 MMBoeDiscovered - 1998Production - 2000

Auger

Conger

Mahogany

Hickory

Enchilada

13

Shelf Miocene GeologyGulfSlope is focused on a proven area of the Miocene where significant fields have been discovered

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

Ultra-DeepGas

Deepwater Miocene & Lower Tertiary

10,000’

20,000’

30,000’

Plio-PleistoceneSuper-Salt

Salt

Salt

Miocene

Lower Tertiary

Miocene

Deepwater

Shelf

GulfSlope Target Section

Lafitte HickoryMahogany

Conger Tahiti Jack

Shelf Miocene

SaltSaltSalt

Lower Tertiary

Upper Miocene

Salt

Salt

Salt

Plio-PleistoceneSupra Salt

30,000'

20,000'

10,000'

0

Shelf Deepwater

North South

Lower Tertiary

TargetZone

5000'

15,000'

25,000'

LowerMiocene

Lower Miocene

Lower Miocene

Upper MioceneUpperMiocene

LafitteMahogany

Hickory Tahiti Jack

Katmai Discovery

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Technology has Reduced Entry Costs

Technology Evolution• Seismic Processing

– Advanced algorithms maximize accuracy

– Processing is now faster and cheaper

– Reverse Time Migration and other technologies utilized by GulfSlope and industry provide the most accurate view of sub-salt prospects

• Seismic Capture– 1990s: 2D and isolated 3D seismic

– Today: 3D data now standard

Maximize chance of discoveries

Improve resource estimates

Enable a small team to successfully compete

Large E&P companies no longer have singular access to the most advanced seismic processing technologies

1980s 1990s 2000 2005 2012

KirchhoffMigration

Wave EquationMigration

Reverse Time MigrationScalable

Processing

Parallel Processing

Computing Cost

Imaging Capability

Beam Migration

Multi-core Processors

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Applying Proven Technology in the Gulf

“The Cardamom discovery [140 Mmboe] was the result of advances in seismic imaging and extended reach drilling. The potential of Cardamom was first recognized early in the Auger development, but could not be fully assessed due to a layer of salt nearby which affected the quality of traditional seismic images. Advances in seismic imaging helped achieve significant improvements.”

– Shell Oil

Shell adds 140 MMboe to 25 year old field with new seismic technology

Mahogany production up ~550% since 2011 [with new drilling] as the field continues to grow

Advancement in seismic improve understanding of sub-salt targets [Mahogany]

New discovery in the T-Sand in June 2013• Deepest production to date [19 years after

initial field discovery]• 370’ of net oil pay from most recent well, 108’

from the newly identified T-Sand• Additional pay to be developed in the newly

identified M, N, and O-Sands with future drilling - W&T Offshore

W&T Offshore continues to grow the initial Shelf Miocene discovery

20 years later with new seismic imaging technology

Auger Field Mahogany Field Conger Field

• New seismic processing used to identify undrained reserves 8 years after startup

• Redevelopment late in life doubled the reserves

• Field returned to peak production

Hess doubles reserves with new seismic

Shell Oil

0

15

30

45

60

2001 2007 2013

Daily Production

Gas

Oil

Mboe/d

Advanced seismic required to fully

develop Mahogany

16

Why We Like the Shelf: Proven Economics

Based January 21, 2015 strip pricing for oil(bbl) / gas (Mcf): 2015 – $53.92/$3.22, 2016 – $60.58/$3.48, 2017 - $65.18/$3.70, 2018 - $69.35/$3.89, 2019 - $70.74/$4.07. Based on Wood Mackenzie data where available or company estimates.

Conger Field Hickory Field

Production (EUR) 243 MMboe 47 MMboe

Commodity 61% Oil 28% Oil

NPV10 $2.7 B $520 MM

IRR 47% 49%

Breakeven Commodity Price $17.03/bbl + 1.70/Mcf 19.82/bbl + 1.98/Mcf

Discovery to Production 2 years 2 years

Exploration Spend at Today’s Cost $105 MM $42 MM

Development Spend at Today’s Cost $977 MM $353 MM

F&D ($/boe) $4.45 $8.46

Discovering E&P Hess Anadarko

Development Sub-sea Platform

Water Depth 1,594’ (Floating Rig Depth) 320’ (Jack-up Rig Depth)

Reservoir Depth 19,845’ 15,970’

What do previous Shelf Miocene fields look like at today’s costs and commodity prices?

Income Actual production history priced on 1/21/15 stripExpenses Modern service costs estimates (mid-year 2014 estimate)

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Valuation: Cobalt Analog

Cobalt

At IPO (1/2010)

GulfSlope

Today (1/2015)

Regional Focus • Sub-salt GoM & W Africa • Sub-salt GoM

Mgmt History • Ex-Unocal & BP • Ex-Anadarko

Asset Acquisition Lease blocks from federal government at annual lease sale

Resource Estimate • 8.2B Boe (1) • 2B+ Boe (1)

Prospect Generation Strategy

• Build veteran team of highly skilled explorationists

• Utilize regional seismic data with newest technology (RTM) to identify and capture high value prospects

Strategy• Drill high impact Miocene prospects

• Establish JVs with E&P partners to diversify risk

GSPE Target Area

Cobalt Target Area (+W Africa)

Source: Company data and public company filings. (1) Based on DeGolyer & MacNaughton Resource Reports. (2) Enterprise value divided by 3rd party recoverable Resource Estimate.

GulfSlope has significant valuation upside vs Cobalt IPO pricing

Valuation (2) • $0.45 / boe • $0.04 / boe

0 12 24 36 48 60 72 84 96 108 120

Shelf

Deepwater

Exploration Drilling

Appraisal Drilling Permitting Construction & Development Drilling

1 2 3 4 YEARS 5 6 7 8 9

+/- 3 Years

+/- 9 Years1

GulfSlope Advantage: Shorter Cycle Times

Value of GulfSlope is approx. $1 billion assuming Cobalt IPO valuation

“Most of the value destruction occurs in the in the appraisal phase when you drill too many wells before making he final [development] investment decision.” – CEO of Deepwater E&P

18

GSPE continues to execute on its strategy of exposing investors to multiple high-impact exploration opportunities

Building Momentum

Announce Drilling Plans

and File Permits

Uplist to National Exchange

Annual Lease Sale March 2015

Drilling Rig Commitment

Spud 1st

Exploration Well Late ’15/Early ‘16

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• On track to drill late 2015/early 2016

• Actively drilling through the oil price downturn with lowest breakeven prices in North America

• 2 Billion boe of potential oil and natural gas resources

• Leading the industry redevelopment of the Shelf Miocene play

• Proven leadership with track record of finding significant oil and gas fields

• Team fully aligned with investors

Investment Highlights“Deepwater size prospects at shallow water costs and with shorter cycle times”

20

Investor Relations Contacts

OTCQB: GSPE

GulfSlope EnergyBrady Rodgers281.918.4110brady.rodgers@gulfslope.com

www.GulfSlope.com

MZ GroupDerek Gradwell512.270.6990dgradwell@mzgroup.us