"With the all-new Chrome Engine 5 powering Dead Island, the game will use the latest installment of Techland’s acclaimed proprietary game engine, allowing the player to experience the tropical island paradise in graphical splendor with diverse environments like lush forests and detailed city environments."
lol and from the eurogamer review rather than a publisher press release
Graphically, it's a bit of a dog.
The Chrome 5 engine conjures up the same jagged Duplo jungle foliage as it did for the wretched Sniper: Ghost Warrior, and constantly struggles with textures, edges and frame-rates. Character models are downright disturbing, with marionette animations and distracting staring bug-eyes. The zombies, at least, are supposed to look horrible but even they're blighted by crude skins and spurting blood that looks like it's been added in MS Paint.