Ancient Art – Steampunk Boys and Ritual Bats
I think the cat captain and the fox engineer guy were drawn together as part of a set, but the others are unrelated.
I actually distinctly remember doodling the guy with the metal leg during one of my undergrad college classes. Paying more attention to art than the teacher, clearly, because I couldn't tell you what the class was about. I'm a big for of the 1990s Looking Glass "Thief" games and I was imagining a stealth infiltration game starring a bionic furry protag dude.
I don't have any context for the bat guys but I do like them.