Notes about the BD1 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The BD1 file type is primarily associated with 'X Operations' by Team Mitei. X Operations is a first person shooter with 007 style graphics and gameplay created by two Japanese Game Developers. You, the hero, can complete any of 59 missions ranging from clearing a whole city to eliminating a single target it KT mode. This file File stores map block locations for X Operations.