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- Sky BattlesReleased: March 25, 2015Publisher: Volens Nolens Games
- An Octave HigherReleased: March 27, 2015Publisher: Playism
- KeeblesReleased: March 27, 2015Publisher: Green Man Gaming Publishing
- The SpatialsReleased: March 30, 2015Engine: Cocos2d-x
- KeeperRLReleased: March 31, 2015Platforms: Microsoft Windows, macOS, Linux
- Hare In The HatReleased: April 2015Developer: RunServer
- Our Personal SpaceReleased: April 7, 2015Developer: Metasepia Games
- Fire: Ungh's QuestReleased: April 9, 2015Platforms: Microsoft Windows, macOS, Linux, Wii U
- Square HeroesReleased: April 9, 2015Engine: Microsoft XNA
- Choice of the Petal ThroneReleased: April 10, 2015Developer: Choice of Games
- Sunrider AcademyReleased: April 15, 2015Publisher: Sekai Project
- FPV FreeriderReleased: April 17, 2015Platforms: Microsoft Windows, macOS
- Island Flight SimulatorReleased: April 17, 2015Developer: Caipirinha Games
- LifelineReleased: April 17, 2015Publisher: Big Fish Games
- Postal 2: Paradise LostReleased: April 17, 2015Developer: Running with Scissors
- Airport Simulator 2015Released: April 22, 2015Developer: LinkSolutions
- Car Mechanic Simulator 2015Released: April 23, 2015Developer: Red Dot Games
- Light BoundReleased: April 23, 2015Platforms: Microsoft Windows, macOS
- Mind Snares: Alice's JourneyReleased: April 23, 2015Publisher: Artifex Mundi
- The Curse of Nordic CoveReleased: April 23, 2015Platforms: Microsoft Windows, macOS, Linux
- SiralimReleased: April 24, 2015Developer: Thylacine Studios
- Koi-Koi Japan [Hanafuda playing cards]Released: April 27, 2015Developer: Zoo Corporation
- Son of NorReleased: April 27, 2015Developer: Stillalive studios
- Broken AgeReleased: April 28, 2015Developer: Double Fine
- Shadowrun Chronicles: Boston LockdownReleased: April 28, 2015Developer: Cliffhanger Productions
- VerdunReleased: April 28, 2015Developer: BlackMill Games, M2H
- Sky ForceReleased: April 29, 2015Developer: Infinite Dreams
- Order of Battle: World War IIReleased: April 30, 2015Developer: The Aristocrats
- R.B.I. Baseball 15Released: April 30, 2015Series: R.B.I. Baseball
- Sky Force AnniversaryReleased: April 30, 2015Developer: Infinite Dreams
- Hollywood VisionaryReleased: May 2015Developer: Choice of Games
- The Adventures of TreeReleased: May 2015Platforms: Microsoft Windows, macOS, Linux
- Lux DeluxReleased: May 1, 2015Platforms: Microsoft Windows, macOS, Linux
- SnakebirdReleased: May 4, 2015Developer: Noumenon Games
- High StrangenessReleased: May 6, 2015Platforms: Microsoft Windows, macOS, Linux, Wii U
- YomiReleased: May 8, 2015Developer: Sirlin Games
- Duck Life: Retro PackReleased: May 11, 2015Platforms: Microsoft Windows, macOS
- WindwardReleased: May 12, 2015Platforms: Microsoft Windows, macOS, Linux
- Love at First SightReleased: May 18, 2015Publisher: Sekai Project
- Spoko and PokoReleased: May 18, 2015Developer: Volens Nolens Games
- Farming Simulator 15Released: May 19, 2015Developer: Giants Software
- Nancy Drew: Sea of DarknessReleased: May 19, 2015Developer: Her Interactive
- BlockstormReleased: May 21, 2015Platforms: Microsoft Windows, macOS, Linux
- PorcunipineReleased: May 21, 2015Developer: Big Green Pillow
- Fort DefenseReleased: May 22, 2015Developer: Creobit
- 60 Seconds!Released: May 25, 2015Developer: Robot Gentleman
- Heroes of LootReleased: May 25, 2015Developer: Orange Pixel
- Dying Light: The Bozak HordeReleased: May 26, 2015Series: Dying Light
- Airport Madness: World EditionReleased: May 28, 2015Developer: Big Fat Simulations Inc.
- Crash Drive 2Released: May 28, 2015Developer: BlackMill Games
- Alter WorldReleased: May 29, 2015Platforms: Microsoft Windows, macOS, Linux
- Lunch Truck TycoonReleased: May 29, 2015Platforms: Microsoft Windows, macOS, Linux
- 12 Labours of Hercules II: The Cretan BullReleased: June 2, 2015Developer: Jetdogs Studios, Zoom Out Games
- The Enchanted Cave 2Released: June 3, 2015Platforms: Microsoft Windows, macOS, Linux
- ZombieRunReleased: June 3, 2015Engine: libGDX
- SimpleRocketsReleased: June 4, 2015Developer: Jundroo
- You Must Build a BoatReleased: June 4, 2015Developer: EightyEight Games
- Chicken Invaders 3Released: June 8, 2015Developer: InterAction studios
- How To Take Off Your MaskReleased: June 19, 2015Developer: Roseverte
- BaronyReleased: June 23, 2015Platforms: Microsoft Windows, macOS, Linux
- Batman: Arkham KnightReleased: June 23, 2015Developer: Rocksteady Studios
- Final Fantasy XIV: HeavenswardReleased: June 23, 2015Developer: Square Enix
- Centauri SectorReleased: June 24, 2015Engine: Construct
- Tap Tap InfinityReleased: June 26, 2015Platforms: Microsoft Windows, macOS
- It's Killing TimeReleased: June 27, 2015Developer: Choice of Games
- Energy BalanceReleased: July 2, 2015Developer: Sometimes You
- Deadlands Noir - That Old Time ReligionReleased: July 3, 2015Platforms: Microsoft Windows, macOS, Linux
- Strawberry CubesReleased: July 4, 2015Platforms: Microsoft Windows, macOS
- PromptReleased: July 6, 2015Developer: Peter Gutenko
- Skullgirls: 2nd EncoreReleased: July 7, 2015Developer: Hidden Variable Studios, M2, Lab Zero Games
- TIMEframeReleased: July 7, 2015Platforms: Microsoft Windows, macOS
- AR-K: The Great EscapeReleased: July 14, 2015Developer: Gato Studio
- Lost Lands: The Four HorsemenReleased: July 14, 2015Developer: FIVE-BN
- A Mass of DeadReleased: July 15, 2015Platforms: Microsoft Windows, macOS, Linux
- AmygdalaReleased: July 15, 2015Platforms: Microsoft Windows, macOS, Linux
- Axis Football 2015Released: July 15, 2015Platforms: Microsoft Windows, macOS, Linux
- Sakura Day MahjongReleased: July 15, 2015Developer: Creobit
- RC Mini RacersReleased: July 16, 2015Platforms: Microsoft Windows, macOS
- Soccer Manager 2015Released: July 16, 2015Platforms: Microsoft Windows, macOS
- Champion of the GodsReleased: July 17, 2015Developer: Choice of Games
- No Time To Explain RemasteredReleased: July 17, 2015Platforms: Microsoft Windows, macOS, Linux
- Samurai of HyugaReleased: July 17, 2015Developer: Hosted Games
- Stranded In TimeReleased: July 17, 2015Platforms: Microsoft Windows, macOS, Linux
- WORLD END ECONOMiCA episode.02Released: July 21, 2015Publisher: Sekai Project
- 9 Clues 2: The WardReleased: July 23, 2015Developer: Artifex Mundi
- ZenzizenzicReleased: July 23, 2015Publisher: Adult Swim Games
- Siege WarsReleased: July 30, 2015Developer: RunServer
- GynophobiaReleased: July 31, 2015Platforms: Microsoft Windows, macOS
- Spooky's Jump Scare MansionReleased: August 2015Developer: Lag Studios
- Cursed SightReleased: August 3, 2015Platforms: Microsoft Windows, macOS, Linux
- Twin RobotsReleased: August 4, 2015Platforms: Microsoft Windows, macOS, Linux, Wii U
- Whispered Secrets: Golden SilenceReleased: August 6, 2015Developer: GrandMA Studios
- 12 Labours of Hercules III: Girl PowerReleased: August 7, 2015Developer: Jetdogs Studios, Zoom Out Games
- Celestian Tales: Old NorthReleased: August 10, 2015Publisher: Digital Tribe
- GunnheimReleased: August 10, 2015Platforms: Microsoft Windows, macOS, Linux
- Bard’s GoldReleased: August 14, 2015Platforms: Microsoft Windows, macOS, PlayStation Vita, Linux
- Big Thinkers KindergartenReleased: August 18, 2015Developer: Humongous Entertainment
- RPG MOReleased: August 18, 2015Platforms: Microsoft Windows, macOS, Linux
- Star BallsReleased: August 18, 2015Developer: Bolder Games