The BFS file extension is related to the FlatOut game data format. FlatOut is a demolition derby-style racing game series made by Bugbear Entertainment. BFS files store game data like car models and tracks. These file types can be unpacked with BFS2Unpacker and bfsunpack tools.
BFS files work on Windows systems. The FlatOut games themselves can open these files too. 1509 other game file types exist as well. BFS was originally made for the bfsunpack software. This unpacks BFS game data.
Some issues opening BFS files can happen. But basic problems are fixable without expert IT help. First the file format must be checked if issues occur. Then proper software is needed to open the file type correctly. BFS files are structured like typical game data.
The extension may appear in other places too. But it might not connect to bfsunpack or FlatOut. So the file contents could be unreadable. Overall BFS files store FlatOut game data. The games rely on these files working right.