| .ADT | Swiftpage, Inc. | Textdateien | ACT! Document Template | World of Warcraft | Blizzard Entertainment Inc. |
| .BLP | Blizzard Entertainment Inc. | Spieldateien | Blizzard Texture File | Warcraft III | Blizzard Entertainment Inc. |
| .CHK | Sophos | Textdateien | InterCheck Checksum Database | StarCraft | Blizzard Entertainment Inc. |
| .COF | Microchip Technology Inc. | Ausführbare Dateien | MPLAB COFF File | Diablo II | Blizzard Entertainment Inc. |
| .D2H | Blizzard Entertainment Inc. | Spieldateien | Diablo II Hack It Module | Diablo II | Blizzard Entertainment Inc. |
| .D2I | Blizzard Entertainment Inc. | Spieldateien | ATMA Diablo II | ATMA | Blizzard Entertainment Inc. |
| .D2S | Blizzard Entertainment Inc. | Spieldateien | Diablo 2 Save File | Diablo II | Blizzard Entertainment Inc. |
| .D2X | Blizzard Entertainment Inc. | Spieldateien | Diablo 2 Stash Data | Diablo II | Blizzard Entertainment Inc. |
| .DC6 | Blizzard Entertainment Inc. | Spieldateien | Diablo 2 Static Image | Diablo II | Blizzard Entertainment Inc. |
| .DCC | Nokia | Einstellungsdateien | Nokia Dynamic Camera Configuration | Diablo II | Blizzard Entertainment Inc. |
| .DIE | Blizzard Entertainment Inc. | Spieldateien | Diablo Item File | Diablo | Blizzard Entertainment Inc. |
| .DT1 | National Geospatial-Intelligence Agency | GIS-Dateien | DTED Level 1 File | Diablo II | Blizzard Entertainment Inc. |
| .EXA | Aquila Software | Einstellungsdateien | Examine32 Saved Search Paramaters File | Warcraft 2 | Blizzard Entertainment Inc. |
| .GRP | Blizzard Entertainment Inc. | Spieldateien | StarCraft Graphics Group File | StarCraft | Blizzard Entertainment Inc. |
| .INDEX | The Eclipse Foundation | Textdateien | Eclipse Help Index | StarCraft | Blizzard Entertainment Inc. |
| .ITM | isee systems | Textdateien | iThink Model File | Diablo II | Blizzard Entertainment Inc. |
| .KEY | Unknown Developer | Verschlüsselte Dateien | License/ Encrypted Security Key File | Diablo II | Blizzard Entertainment Inc. |
| .M2 | Unknown Developer | Audiodateien | PC-98 Game Music File | World of Warcraft | Blizzard Entertainment Inc. |
| .M3 | Blizzard Entertainment Inc. | 3D-Dateien | Blizzard MDX3 Model File | Blizzard StarCraft 2 | Blizzard Entertainment Inc. |
| .MA | Autodesk, Inc. | 3D-Dateien | Maya Project File | Diablo II | Blizzard Entertainment Inc. |
| .MA2 | Blizzard Entertainment Inc. | Spieldateien | Diablo II Map File | Diablo II | Blizzard Entertainment Inc. |
| .MDX | Disc Soft Ltd. | Diskimagedateien | Extended Media Descriptor File | Warcraft III | Blizzard Entertainment Inc. |
| .MLX | MathWorks | Ausführbare Dateien | MATLAB Live Script | StarCraft | Blizzard Entertainment Inc. |
| .MPQE | Blizzard Entertainment Inc. | Textdateien | Blizzard Encrypted Mo'PaQ File | Blizzard StarCraft 2 | Blizzard Entertainment Inc. |
| .NTL | Blizzard Entertainment Inc. | Spieldateien | Diablo 2 Mod D2NT Script | Diablo II | Blizzard Entertainment Inc. |
| .PUD | Blizzard Entertainment Inc. | Spieldateien | Blizzard Map | StarCraft | Blizzard Entertainment Inc. |
| .REP | Rockstar Games | Spieldateien | Grand Theft Auto Replay File | Blizzard StarCraft 2 | Blizzard Entertainment Inc. |
| .SCM | Gimpel Software | Plugindateien | GIMP Script-Fu Script | StarCraft | Blizzard Entertainment Inc. |
| .SCX | RIX SoftWorks, Inc. | Rasterbilddateien | ColoRIX Bitmap Graphic File | StarCraft | Blizzard Entertainment Inc. |
| .SMK | RAD Game Tools | Videodateien | Smacker Compressed Movie File | StarCraft | Blizzard Entertainment Inc. |
| .SMS | Sega | Spieldateien | Sega Master System ROM | Warcraft 2 | Blizzard Entertainment Inc. |
| .TBL | Blizzard Entertainment Inc. | Textdateien | StarCraft Information Table | StarCraft | Blizzard Entertainment Inc. |
| .TOC | Sony | Audiodateien | Sony PlayStation Portable (PSP) Audio File | World of Warcraft | Blizzard Entertainment Inc. |
| .W3G | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Replay File | Warcraft III | Blizzard Entertainment Inc. |
| .W3M | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Map File | Blizzard Warcraft 3 | Blizzard Entertainment Inc. |
| .W3N | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Expansion Campaign Map File | Warcraft III | Blizzard Entertainment Inc. |
| .W3P | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Progress File | Warcraft III | Blizzard Entertainment Inc. |
| .W3U | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Custom Units Data | Warcraft III | Blizzard Entertainment Inc. |
| .W3V | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Campaign Progress Record | Warcraft III | Blizzard Entertainment Inc. |
| .W3X | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Expansion Map FIle | Warcraft III | Blizzard Entertainment Inc. |
| .W3Z | Blizzard Entertainment Inc. | Spieldateien | Warcraft 3 Saved Game File | Blizzard Warcraft 3 | Blizzard Entertainment Inc. |
| .WDB | Microsoft Corporation | Datenbankdateien | Microsoft Works Database | World of Warcraft | Blizzard Entertainment Inc. |
| .WMO | World Meteorological Organization | Textdateien | WMO Binary Format File | World of Warcraft | Blizzard Entertainment Inc. |
| .WTF | Blizzard Entertainment Inc. | Spieldateien | World Of Warcraft Text File | World of Warcraft | Blizzard Entertainment Inc. |
| .XXX | BloodDolly | Verschlüsselte Dateien | TeslaCrypt 3.0 Ransomware Encrypted File | StarCraft | Blizzard Entertainment Inc. |
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