A late mention, The BJ that stole Xmas is a new release by the entity TryHardWolfers, who has just recently joined ModDB to post their project, originally released a few weeks ago.
The project has you walking through a decorated castle(?) fighting tactically placed enemies. The objective in this game is changed in a way similar to Corridor 7; requiring the player to locate all the present items in a level to proceed to the next. BJ being green probably lends to a Grinch theme.
The game is made using the DOS Wolf3D engine, and will require emulation via a program like DosBox to work.
The BJ that stole Xmas (ModDB)
Screenshot from ModDB page