| yfs | YSFLIGHT Scenery Data |
| yft | Grand Theft Auto V Fragment Object |
| ygt | Ylands Game Template |
| yif | Mungyodance Game Data |
| ymf | Grand Theft Auto V Manifest Data |
| ynm | How to Survive 2 Saved Game |
| ypt | GTA 5 Particle Data |
| yrm | Command and Conquer Multiplayer Map |
| yrp | YGOPRO Replay Data |
| ysd | Ylands Support Data |
| ytd | Grand Theft Auto V Texture Dictionary Data |
| z2f | Zoo Tycoon 2 Data |
| z2s | Zoo Tycoon 2 Saved Game |
| z3m | Risk Your Life 3D Model |
| za | Elite Warriors: Vietnam Game Data |
| za | Line of Sight: Vietnam Game Data |
| zad | Carmageddon Game Data |
| zca | ROSE Online Game Data |
| zcache | Venture the Void Cache Data |
| zd2 | Zillions of Games Locked Rules Data |
| zdd | ZDaemon Demo |
| zdf | Zoid Commando Player Data |
| zdk | ZQuake Game Data |
| zdo | ZDaemon Recorded Demo |
| zds | GZDoom Saved Game |
| zei | Anno 1602 Game Data |
| zfs | Call To Power II Game Data |
| zfs | Interstate 82 Game Data |
| zgp | Zelda Classic Graphics Pack |
| zik | Atlantis: The Lost Tales Audio Data |
| zipfs | 18 Wheels of Steel Data |
| zmap | Zombies Ate My Neighbors Map |
| zmd | Dave Mirra Freestyle BMX Data |
| zmd | ROSE Online Model Bones Data |
| zmo | ROSE Online Model Animation |
