| xtbl | Saints Row 4 Game Data |
| xtl | Vietcong Data |
| xwc | The Chronicles of Riddick: Escape from Butcher Bay Data |
| xwi | Star Wars: X-Wing Mission Data |
| xwm | Elder Scrolls V: Skyrim Audio Data |
| xxw | Zero Engine Terrain Data |
| yaf | SmackDown Game Audio Data |
| ydc | Yu-Gi-Oh! Power of Chaos Card Deck |
| ydd | Grand Theft Auto V Drawable Dictionary Data |
| ydf | FiveM 3D Model |
| ydk | YGOPRO Deck Data |
| ydr | FiveM 3D Model |
| ydr | Yu-Gi-Oh! Power of Chaos Replay |
| ydt | Yu-Gi-Oh! Power of Chaos Game Data |
| yfs | YSFLIGHT Scenery Data |
| yft | Grand Theft Auto V Fragment Object |
| yif | Mungyodance Game Data |
| ypt | GTA 5 Particle Data |
| yrm | Command and Conquer Multiplayer Map |
| yrp | YGOPRO Replay Data |
| ytd | Grand Theft Auto V Texture Dictionary Data |
| z2f | Zoo Tycoon 2 Data |
| z3m | Risk Your Life 3D Model |
| za | Line of Sight: Vietnam Game Data |
| zad | Carmageddon Game Data |
| zdd | ZDaemon Demo |
| zdf | Zoid Commando Player Data |
| zdo | ZDaemon Recorded Demo |
| zds | GZDoom Saved Game |
| zei | Anno 1602 Game Data |
| zfs | Interstate 82 Game Data |
| 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 |