After Wave: Downfall is an arcade shooter where the player battles against monsters, completes various missions with a cool battleship.  Deathrix invaded the world and released a mysterious meteorite causing a great flood. Players can upgrade their ships for better performance to fight the most brutal enemies.  A Local Co-op mode allows the player to team up and adventure with others. 

--3D cartoon style graphics with stunning effects.
--Join your friends on an adventure in a local Co-op mode.
--Multiple difficulty levels.
--10 stages to overcome with many brutal bosses.
--Upgrade your battleship systems to develop different playing skills.
--Six battleships to choose from with different abilities.
--Extra mode allows playing in multiple ways.
--Many achievements within the game to unlock.

More details on the official game page of After Wave: Downfall ...