Filibuster Invasion (フィリバスター襲来ステージ, Filibuster Attack Stage in the Japanese version) is a special stage in Cats of the Cosmos Chapter 3. It temporarily replaces a random stage after completing the chapter for the first time, much like a Zombie Outbreak. It can only be completed once. Upon completion, Filibuster Cat X will be unlocked.
There are no restrictions for this stage.
Shadow Boxer K spawns when Kid Tappa is killed, after 6.7 seconds.
Bore spawns when Shadow Boxer K is killed, after 10 seconds.
Bun Bun Symbiote spawns when Bore is killed, after 80 seconds.
General GreGory spawns with a boss shockwave when the enemy base is at or below 50% HP, and another without a boss shockwave spawns at 25% HP.
- Prior to version 8.3.2, Filibuster Obstructa stood in front of Kid Tappa, thus allowing players to cheese this stage by enabling Sniper The Cat and deploying no units until Filibuster Obstructa was killed.