Yeah, inspired by Half-life and Bioshock could mean a lot of different things, and his elaboration in that interview doesn't really expand mich. "Player centric" vs "squad based" is what he mentions. I guess he means you'll be the lone survivor in a hostile surrounding without backup maybe?. Which is not really a unique or even slightly rare concept. You might as well say you were influenced by DOOM (even though you had helpers in the new one, though not in combat) at that point.