In B.B. & SL4K you play as Butch Badass, an ex-commando augmented with bionic implants, and Space Leech 4000, an alien with psychic powers of unbelievable magnitude.
Together B.B. & SL4K have to escape Area 51, where they have been imprisoned and subjected to horrible experiments. Butch is able to jump and activate buttons, while his slimy friend SL4K can manipulate objects with his telekinetic ability. Together they have to evade powerful lasers, deadly spikes and rapid firing turrets, all while solving puzzles and making their way through the level.