| dazip | Dragon Age: Origins Game Data |
| db0 | Stalker Game Data |
| db1 | Stalker Game Data |
| db2 | Stalker Game Data |
| dcg | Pro Pinball: Fantastic Journey Data |
| dd2 | Dungeon Designer 2 Map Design |
| dd3 | Blood Bowl Game Data |
| ddj | SilkRoad Online Image |
| ddo | Tank3D Game Data |
| ddsx | Stronghold Kingdoms Game Data |
| ddt | Football Manager Data |
| ddv | Oddworld: Abes Oddysee Data |
| dek | Magic: The Gathering Deck |
| dek | LackeyCCG Deck File |
| derf | Dungeon Bot Engine Room Data |
| desc | Battlefield 2 Map Description File |
| dfs | Dragona Online Game Data |
| dhm | Shadowgrounds Mission Data |
| dhs | Shadowgrounds: Survivor Script |
| dhu | Shadowgrounds: Survivor Unit |
| die | Diablo Item Data |
| diva | Project DIVA Song |
| dkx | Submarine Titans Game Data |
| dlg | Bioware Aurora Dialog Data |
| dm3 | Quake 3 Arena Demo |
| dmap | Conquer Online 2 Game Map |
| dmo | Duke Nukem 3D Demo File |
| dmod | Dink Smallwood Add-on |
| dn1 | Duke Nukem 1 Game Data |
| dnf | Duke Nukem Forever Data File |
| dnh | Danmakufu Script |
| dni | realMyst 3D Data File |
| dnm | YS Flight Dynamic 3D Model |
| dnp | Eudemons Online Data |
| dnr | Beneath a Steel Sky Game Data |