Keen Engine Test
Keen Engine Test is an abandoned fangame without a proper title created by DSL with Multimedia Fusion. Its latest demo version, 0.13, dates to January 2005. The author intended to replicate the mechanics of Keen 4-6. Keen is able to perform most of his moves from said games, and menus also follow the style of those found in Keen 4-6. The demo version features a single level named Strange House with many items to collect and some robot enemies, but no exit.
The game's events take place after Aliens Ate My Baby Sitter! With the Bean-with-Bacon Megarocket, Keen and Molly return to Earth. Billy arrives home before his parents do so. After he wakes up from sleep, Billy learns that the whole Earth is frozen, everything has stopped moving due to a freeze beam. Billy was only spared from its effects thanks to the anti-freeze-beam device in his room, which also tracked the beam's source. Before he travels into space again, Commander Keen decides to investigate Mortimer's house.