... speaking of sentry-droids, this here is one of the Batcave's 'guard-dogs'... I purposely wanted to use the old school Batmobile fender-shield as this droids 'face' ...I don't know if this made it in the game, but I envisioned these droids as hell-on-wheels, and each 'wheel-leg' has independent suspension so they can deal with the crazy-uneven cave terrain.
I imagined the movement of these droids as very very aggressive, almost 'roaring' with their engines if they see an intruder in the cave. or if Bats decides to use them to go out and do recon in Gotham?
Shit, after reading Kingdom Come I could totally see these going about Gotham alongside those freaking Bat Bots. Nobody would wanna leave Arkham with these on the streets.
If I remember they were available as a bonus if you pre-ordered one of the versions of the game, can't remember which edition. I don't know if they had this design though, I didn't have the money to get it at the time.