Engineer brings an oddly-behaving Scoutbot into the base in the hopes of dismantling and studying it, and the other mercenaries have to figure out how to cope with it as it learns how to live and interact with humans. Unfortunately, all of Mann Co. will have to deal with the consequences of Engineer's rash decision. Rated T for the usual TF2 stuff. Now with official cover.

Meteors, signals, apologies, and that tricky little thing called humanity- four years after the events of Portal II, Wheatley's been handed a second chance, but it's not going to be plain sailing…