| File Extension: | XXI |
| File Type Description: | GameSpy Arcade Game File |
| File Type Developer: | IGN Entertainment |
| Primary Associated Software: | GameSpy Arcade |
| Primary Software Developer: | IGN Entertainment |
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IGN Entertainment created the GameSpy Arcade Game File (XXI) file for the GameSpy Arcade software series. Our data shows that XXI files are frequently utilized by PC users in United States and popular on the Windows 10 platform. Statisically, these users are most likely running the Google Chrome internet browser.
 | GameSpy Arcade by IGN Entertainment |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .SSC | Microsoft Corporation | Developer Files | SourceSafe Status File |
| .256 | Interplay Entertainment | Game Files | Descent 2 Color Palette File |
| .RGD | Redbeet Interactive | Game Files | Raft Saved Game File |
| .PAZ | PEARL FOUNDATION | Game Files | Black Desert Game Data |
| .REL | Nintendo | Game Files | Relocatable Module File |
| .CEM | Tilted Mill Entertainment | Game Files | Children Of The Nile Model File |
| .BEX | Symantec Corporation | Data Files | PGP Binary Extracted Public Key |
| .AAO | U.S Army | Game Files | America's Army Map File |
| .KWD | KDE | Text Files | KWord Document |
| .FPS | The Game Creators | Game Files | FPS Creator Segment File |
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