| File Extension: | CK2 |
| File Type Description: | Commander Keen 2 Game Data |
| File Type Developer: | id Software |
| Primary Associated Software: | TED5 |
| Primary Software Developer: | id Software |
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Id Software developed the Commander Keen 2 Game Data file type when the TED5 was initially released. According to our internal data, Commander Keen 2 Game Data files are most popular with users in United States, with a majority of them running Windows 10. A high percentage of these users browse the web using Google Chrome.
 | TED5 by id Software |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | DOS |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .JBL | id Software | Game Files | Doom Scene Add-on File |
| .EFX | j2 Global, Inc. | Data Files | eFax Document |
| .BEX | Symantec Corporation | Data Files | PGP Binary Extracted Public Key |
| .PK3 | id Software | Game Files | Quake 3 Engine Game Data File |
| .ZDK | id Software | Game Files | ZQuake Game Data |
| .XGC | id Software | Uncommon Files | GtkRadiant XML Game Config |
| .MTR | Knife Edge Software | Game Files | RealFight Radio Control File |
| .WAL | Nullsoft | Uncommon Files | Winamp Modern Skin |
| .BSP | id Software | Game Files | Quake Engine Game Map File |
| .MENU | id Software | Game Files | Quake 3 Engine Menu File |
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