| .xp4 |
KiriKiri Package |
| .xan |
Worms Map File |
| .xvmconf |
World of Tanks XVM Configuration File |
| .xgdw |
GDevelop Extension File |
| .xp |
Fastracker 2 Pattern |
| .xtl |
Vietcong Data File |
| .xp2 |
XPilot NG |
| .ycm |
Yugioh Card Maker File |
| .ydr |
Yu-Gi-Oh! Power of Chaos Replay File |
| .ydc |
Yu-Gi-Oh! Card Deck File |
| .ydk |
Yu-Gi-Oh! Deck File |
| .y3a |
Yu-Gi-Oh! ONLINE 3 Avatar File |
| .y3d |
Yu-Gi-Oh! ONLINE 3 Deck File |
| .yfs |
YSFLIGHT Mission File |
| .ytd |
Grand Theft Auto 5 Texture File |
| .ydt |
GTA V Texture Dictionary File |
| .zip |
Compressed Archive File |
| .z64 |
Nintendo 64 Game ROM |
| .zst |
ZSNES Save File |
| .zmap |
Zombies Ate My Neighbors Map File |
| .zds |
DesignPro Label File |
| .ztd |
Zoo Tycoon Data Archive |
| .zs0 |
ZSNES Slot 0 Saved State File |
| .zs1 |
ZSNES Slot 1 Saved State File |