Activate is an upgrade from the Slush Invaders: Game which unlocks a standard attack for Stickyle where he launches a small kick and an explosive fireball in direct contact. When his kick lands, a huge green explosion happens. He performs a secondary kick if his first kick is successful.
The explosion is able to hit multiple enemies and Stickyle is invincible while performing the attack.
- The upgrade costs 40,000 points.
- The secondary kick Stickyle does is a re-used animation from the opening cutscene when Stickyle kills a Blue.
- This is the only upgrade from the Slush Invaders: Game which makes an Auto Fighter a Standard Fighter.