Attack of the Killer Rabbids from Outer Space: the lost coop FPS similar to L4D (Patreon)

Attack of the Killer Rabbids from outer Space, later retitled Killer Freaks from outer Space, was a first person shooter developed by Ubisoft Montpellier that would eventually become ZombiU for the Wii U. Originally planned as an untitled horror shooter for the PS3 and Xbox 360 in 2010, the game was already intended to be a part of the Rayman spinoff series Raving Rabbids wherein earth was attacked by a much more frightening “cousin” of the Rabbids. Early concept art depicts them as being very similar looking to the Rabbids but with sharp teeth and, in some instances, missing their eyeballs. Also revealed in concept art were designs for different types of enemies such as a basic trooper, a shield trooper, a giant Rabbid, UFOs, and a variety of other alien vehicles. Multiple soldiers can be seen fighting the Rabbids in some of the art, suggesting that would the player would not only be taking the role of one of these soldiers, but there would be co-op multiplayer as well:  https://www.unseen64.net/2016/10/18/attack-of-the-killer-rabbids-from-outer-space-cancelled/