Wrack

"Wrack is an arcade-style FPS that draws inspiration from classic games across multiple genres -- Doom, Contra, Mega Man, etc. -- that puts its own unique spin on things! Between its fun and unique gameplay, its vibrant cel-shading, and its compelling characters, Wrack strives to be a modern day classic!" "Play as Kain Sager as he attempts to save mankind from a deadly alien invasion, and find redemption." (source:)