I
- I.G.I. Origins
- I.G.I 2: Covert Strike
- I am Alive
- I am Jesus Christ
- Icarus
- ICEBOX: Speedgunner
- I Expect You To Die 2
- iFPS Online
- I Hate Running Backwards
- Ikai
- ILL
- Illumina
- illWill
- Il était une fois un .wad
- Immentum
- Immortal Redneck
- Immortals of Aveum
- Impaler
- Impulsion
- Incision
- INCorporated
- Incursion Red River
- Indiana Jones and the Emperor's Tomb
- Indiana Jones and the Great Circle
- Industria
- Industria 2
- Infestation : The New Z
- Infra
- inMomentum
- Inner Ashes
- Inner Chains
- Insane Insects
- Insight
- In Silence
- In Sound Mind
- Instinct
- Instinction
- Insurgency
- Insurgency: Sandstorm
- Interastra
- Interpoint
- Interstellar Marines
- In the Kingdom
- In the valley of gods
- Into The Breach
- Into the Dark
- Into the Dark II: Into the Ice
- Into The Light
- Into the Pit
- Into The Radius
- Into The Radius 2
- Intruder
- Intruder Alert!
- In Verbis Virtus
- inXile Entertainment
- Ion
- Ion Fury
- Ion maiden
- Iron Front - Liberation 1944
- Iron Grip: Warlord
- Iron Sight
- Ironsight
- Iron Storm
- Islands of Nyne
- Islands of Nyne: Battle Royale
- Isolani
- Isonzo