| 3j | Developer | |
| 4 Bit Indie | Developer | |
| 4 Corner Games | DeveloperPublisher | |
| 4000Do Inc. | Developer | |
| 404 | Developer | |
| 40mackenzie | Developer | |
| 40wattstudio | Developer | |
| 42 BYTES | Developer | |
| 43K Studios | Developer | |
| 43ther | Developer | |
| 43v3r_1mag1n3 | Developer | |
| 443 Production | Developer | |
| 44Magdalene | Developer | |
| 47_Ronin_Games | Developer | |
| 49 Games | Developer | |
| 49Games | Developer | |
| 4A Games | Developer | |
| 4Bit Games | DeveloperPublisher | |
| 4Co | Developer | |
| 4D Door Games | Publisher | |
| 4D Rulers | Developer | |
| 4DMinds | Developer | |
| 4DTri | Developer | |
| 4DX Games | Developer | |
| 4Edges | Developer | |
| 4HEAD Studios | Developer | |
| 4Happy Studio | Developer | |
| 4Hit | Publisher | |
| 4J Studios | DeveloperPublisher | |
| 4KbShort | Developer | |
| 4L Games | Developer | |
| 4MB Interactive | DeveloperPublisher | |
| 4Mation | DeveloperPublisher | |
| 4Mation Educational Resources | Publisher | |
| 4X Studios | Developer | |
| 4byterob | Developer | |
| 4gency | DeveloperPublisher | |
| 4hStudioLab | Developer | |
| 4j Studios | Developer | |
| 4mat | Developer | |
| 4mm Games | Developer | |
| 4noki | Developer | |
| 4shbomb | Developer | |
| 4thdimensionclub | Developer | |
| 4xisblack | Developer | |
| 4zeer0 | Developer | |
| 4ztex | Developer | |
| 5 Bits Games | Developer | |
| 5 Ever Games | Developer | |
| 5 Lives Studios | Developer | |
| 5 Pyr | Developer | |
| 5000 ft | Developer | |
| 5000 ft Inc. | Developer | |
| 5000ft | Developer | |
| 5010 Games | Developer | |
| 502 Studios | Developer | |
| 505 Game Street | Publisher | |
| 505 Game StreetEU | Publisher | |
| 505 Game StreetFR | Publisher | |
| 505 Game StreetPAL | Publisher | |
| 505 GameStreet | Publisher | |
| 505 GameStreetPAL | Publisher | |
| 505 Games | DeveloperPublisher | |
| 505 GamesEU | Publisher | |
| 505 GamesPAL | Publisher | |
| 51Pegasi Studios | Developer | |
| 51stAndFire | Developer | |
| 555vick | Developer | |
| 562 Interactive | DeveloperPublisher | |
| 562 Studios | DeveloperPublisher | |
| 56yulo | Developer | |
| 573 Games | Developer | |
| 5HorsemenGames | Developer | |
| 5K Studios | Developer | |
| 5Mixer | Developer | |
| 5PM Kids | Developer | |
| 5Stars | Developer | |
| 5TEV3N | Developer | |
| 5TH Cell | Developer | |
| 5am Games | Developer | |
| 5asbay | Developer | |
| 5co4p1on | Developer | |
| 5gk | Publisher | |
| 5heart | Developer | |
| 5imon | Developer | |
| 5pb | DeveloperPublisher | |
| 5pb. | DeveloperPublisher | |
| 5pb. Division 2 | Developer | |
| 5pb. Games | DeveloperPublisher | |
| 5th Cell | Developer | |
| 5th Interactive | Developer | |
| 5tickman | Developer | |
| 6 Eyes Studio | Developer | |
| 6 Pixel Studios | Developer | |
| 608fromtensortown | Developer | |
| 60fingers | Developer | |
| 612 Entertainment | Publisher | |
| 648trindade | Developer | |
| 64KB Studio | Developer | |
| 64WD Creation | Developer | |