Toppledge
Sure

After finishing Endless Legend I started Dungeon of Endless and to my surprise who I meet there? Our favorite mercenaries, Heavy, Medic, Pyro and Engineer!

It's nice how the TF2 mercs have some nice custom animations for stuff like opening doors, but damn if Engineer sound for "operaring" a module doesn't get irritating after a while.

Fun game, I think I'm close to beating it, but looks like the last 2 levels are kind hard..