- Part of the Invasion of the Yorps trilogy
- Tileset: completely redone tileset with some recolored tiles
- Sprite animation frames: Reused and recolored Yorps, new monsters
- Story text: new with continuity to Crash on Gobo III
- Levels: 16 regular levels; 1 worldmap
- Bugs: No known errors or bugs
After escaping from Gobo III keen returns home to find a Yorp mother ship hovering around the Earth. Keen boards the ship and discovers that it is on a mission to destroy Earth and several other planets. Keen also finds out that the Yorps have been brainwashed by Mortimer to do his evil biddings. Keen must destroy the laser machines and stop the Yorp menace.
|Yorp: Deadly to touch. One shot to kill. Green. The bevaviour of the Yorp in this mod is different from the one in Keen 1. They are dangerous here, which is (according to the story) due to Mortimers brainwashing.(Vorticon Grunt replacement)|
|Yorp Elite: The helptext of the game simply states: Deadly to touch. Three hits to kill. Blue. This is a specially trained Yorp that has the ability to shoot deadly rays from its eye. Further it can run very fast and jump higher than a normal Yorp. (Vorticon Elite replacement)|
|Noid: A stow away creature from the Yorp planter. They generally cause havock wherever they appear by knocking you out. Fortunately it only takes one hit to kill. (Youth replacement)|
|Orba: A robot designed and used by the Yorps on their battleship. Basically a green ball with yellow spots that went beserk on activation and kills anything. It is deadly to touch and shoots alot. (Guard Robot replacement)|
|Pupball: Little guys that live in the Yorp battleship. They take only one hit to kill, but they can be helpful, so you might not want to kill them. (Scrub replacement)|
|Electrigator: A creature with two mouths, one in the floor sucking energy, the other above eating anything else. It apparently feeds on both, the ships electricity and living beings that get caught in its upper mouth. (non moving tileset enemy similar to Pat Pat)|
Spoiler Warning! This shows the whole levels.