Développeurs Steam avec la lettre X
| Nom | Nombre d'applications |
|---|---|
| XenoAisam | 23 |
| XiNFiNiTY Games | 22 |
| XSGames | 17 |
| 2x2 Games | 16 |
| XDEVS LTD | 15 |
| XO GAMES | 15 |
| XIAOXIAO STUDIO | 14 |
| Xefier Games Inc. | 11 |
| Xitilon | 10 |
| XXIV | 10 |
| Xaloc Studios | 10 |
| XDesktopSoft | 9 |
| XD | 9 |
| 3X Entertainment Limited | 8 |
| Xeneder | 8 |
| Xendra | 7 |
| XOCUS | 7 |
| Xatrix Entertainment | 7 |
| xRed Games | 7 |
| xe2050 | 6 |