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| 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 | |