Commander Keen 2.5D is a doom2 mod for the GZDOOM source port that revolves around the adventures of Billy Blaze (aka Commander Keen), an 8-year old genious with an IQ of 314 who built an interstellar rocketship out of soup cans and plastic tubing and called it the bean-with-bacon megarocket.

This mod combines the universe of Commander Keen with the first-person shoot-em up gameplay of Doom, making for one very keen gaming experience =)

In The Quest for Spot's Collar, aliens from gloogulus prime have stolen the collar from Spot, Billy's pet yorp, and have taken it to their home planet! Without his collar, Spot has been caught by an alien dog-catcher and was put in a galactic pound! Will Commander Keen overcome the gloogulons and save Spot from the pound? Find the answers in this keentastic journey!