He's basically a super smart Terminator ninja.

Strikes from the darkness, solves murders, has tons of cool gadgets and never gives up until his job is done.

Some of his popular stories are him solving some really horrific shit, or him being extremely old and executing a plan 20 years in the making after he retires, or him being shot with Omega beams, and then travelling back through time while being an amnesiac and also a reality bomb, all the while fighting cavemen, witch-hunters, pirates, cowboy bandits, some mobsters, the Justice League and finally programming a race of time-computer aliens to merge with him in order to come back to the present so the Justice League can kill the time-travelling beast that's been hunting him, then medically die and be revived (to defuse the reality bomb) so he can immediately return to Gotham to resume his role as Batman (immediately as in like an hour later he's there and ready to fight a villain who shoots Dick Grayson in the skull).