| bfsar | Mario Kart 8 Effects Data |
| bg | Backgammon for Windows Saved Game |
| bgf | Jack Nicklaus 4 Game Data |
| bgl | MS Flight Simulator Compressed Scenery |
| bgui | Need for Speed Shift GUI Data |
| bh3 | Rise of Nations Unit Graphic Data |
| bha | Rise of Nations Unit Graphic Data |
| bhs | Rise of Nations Script |
| bic | Civilization 3 Scenario |
| bidmp | Armed Assault Crash Dump |
| bif | Bioware Game Data |
| big | EA Compressed Game Archive |
| biq | Civilization 3 Scenario |
| bkg | BKG Backgammon Game Data |
| bksb | Temple Run 3D Model |
| blight | Mario Kart Binary Light Data |
| blk | Descent Mission Builder Block |
| blorb | Interactive Fiction Package |
| bls | Blockland Saved Game |
| blue | EVE Online Generic Data File |
| blv | Might and Magic 6 Level Geometry Data |
| bly | FIFA World Cup Game Data |
| blz | N-Gage Video Game |
| bm1 | Apogee Bio Menace Map |
| bmd | MU Online Game Data |
| bmd | Super Mario Sunshine Game Data |
| bme | BeatMania Song |
| bmg | Mario Kart Wii Message File |
| bmq | Re-Volt Texture Data |
| bms | BeatMania Song |
| bms | Be-Music Script |
| bmu | Bioware Aurora Music Unit |
| bmz | Portal Bonus Map Zip |
| bni | Battle.net Icon File |
| bnry | The Sims 4 Game Data |