Incredibly fun four-person FPS with elements of exploration and creative problem-solving. It's kind of like Minecraft with heavy guns and bearded dwarves. The four different classes complement one another nicely, with each class providing different strengths: the gunner is offense, the engineer is support, the scout zips around to hard to reach places, the driller, uh, drills. It makes for a lot of fun with four of your pals. Definitely worth the $30 price tag (although I picked it up during the Steam Summer Sale 2020 for about $22.50).