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| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .Z | Smith Micro Software | Game Files | Unix Compressed File | 7-Zip | Igor Pavlov |
| .Z1 | Check Point Software Technologies Ltd. | Game Files | ZoneAlarm Mailsafe Renamed Data | WinZip | Corel |
| .Z2 | Infocom | Game Files | Z-machine Z-code Version 2 File | Windows Frotz | SourceForge |
| .Z2F | Microsoft Corporation | Game Files | Zoo Tycoon 2 Object File | Zoo Tycoon 2 | Microsoft Corporation |
| .Z3 | Infocom | Game Files | Z-machine Z-code Version 3 File | Windows Frotz | SourceForge |
| .Z4 | Infocom | Game Files | Z-machine Z-code Version 4 File | Windows Frotz | SourceForge |
| .Z5 | Infocom | Game Files | Z-machine Z-code Version 5 File | Windows Frotz | SourceForge |
| .Z64 | Open Source | Game Files | Japanese Nintendo 64 Game ROM | Project64 | Open Source |
| .Z7 | Infocom | Game Files | Z-machine Z-code Version 7 File | Windows Frotz | SourceForge |
| .ZA | nFusion Interactive | Game Files | nFusion Game Data | Elite Warriors: Vietnam | nFusion Interactive |
| .ZAD | Predrag Brodanac | Game Files | ZadGen Document File | ZadGen | Predrag Brodanac |
| .ZAR | Sony | Game Files | PlayStation 2 Audio Data | PlayStation 2 | Sony |
| .ZDK | id Software | Game Files | ZQuake Game Data | ZQuake | id Software |
| .ZEI | Ubisoft | Game Files | ANNO 1602 Game Data | Anno 1602 | Ubisoft |
| .ZFS | Activision | Game Files | Interstate '76 And '82 Game Archive File | Interstate '76 | Activision |
| .ZGEPROJ | Unknown Developer | Game Files | ZGame Editor Project File | ZGameEditor | Unknown Developer |
| .ZIP | Winrar | Game Files | Zipped File | 7-Zip | Igor Pavlov |
| .ZM3 | Check Point Software Technologies Ltd. | Game Files | ZoneAlarm Mailsafe Renamed Data | WinZip | Corel |
| .ZM9 | Check Point Software Technologies Ltd. | Game Files | ZoneAlarm Mailsafe Renamed Data | WinZip | Corel |
| .ZMAP | KONAMI | Game Files | Zombies Ate My Neighbors Map File | Zombies Ate My Neighbors | KONAMI |
| .ZMO | GRAVITY | Game Files | ROSE Online Model Animation | ROSE Online | GRAVITY |
| .ZON | Nuance | Game Files | OmniPage Zone Template File | OmniPage | Nuance |
| .ZPAK | Sony Mobile Communications | Game Files | Sony Ericsson Xperia Play Game Pack File | PSXperia | Yifan Lu |
| .ZRB | RAD Game Tools | Game Files | Smacker Compressed Video Data | Total Annihilation | Cavedog |
| .ZRF | Zillions Development Corp | Game Files | Zillions Rules File | Zillions of Games | Zillions Development Corp |
| .ZS1 | Nintendo | Game Files | ZSNES Slot 1 Saved State File | ZSNES | Nintendo |
| .ZS2 | Nintendo | Game Files | ZSNES Slot 2 Saved State File | ZSNES | Nintendo |
| .ZS3 | Nintendo | Game Files | ZSNES Slot 3 Saved State File | ZSNES | Nintendo |
| .ZS4 | Nintendo | Game Files | ZSNES Slot 4 Saved State File | ZSNES | Nintendo |
| .ZS5 | Nintendo | Game Files | ZSNES Slot 5 Saved State File | ZSNES | Nintendo |
| .ZS6 | Nintendo | Game Files | ZSNES Slot 6 Saved State File | ZSNES | Nintendo |
| .ZS7 | Nintendo | Game Files | ZSNES Slot 7 Saved State File | ZSNES | Nintendo |
| .ZS8 | Nintendo | Game Files | ZSNES Slot 8 Saved State File | ZSNES | Nintendo |
| .ZSD | Acclaim Entertainment | Game Files | Dave Mirra Freestyle BMX Data File | Watto Studios Game Extractor | Acclaim Entertainment |
| .ZST | Nintendo | Game Files | ZSNES Save File | Snes9x | Snes9x Team |
| .ZTD | Microsoft Corporation | Game Files | Zoo Tycoon Data Archive | Microsoft Zoo Tycoon | Microsoft Corporation |
| .ZTMP | Valve | Game Files | Steam Compressed Game Resource File | Valve Steam HLDS Update Tool | Valve |
| .ZX | Unknown Developer | Game Files | KGB ZX Spectrum Emulator Snapshot | KGB | Unknown Developer |
| .ZZZ | Piriform | Game Files | CCleaner Securely Deleted File | CCleaner | Piriform |
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