Deep Silver has just announced that Dead Island Riptide is in full development for consoles and PCs. Techland, the same studio that made the original game, is working on the sequel.
More information will be revealed "later this summer," but I think it is safe to assume there will be zombies, water, and wallets. After the first Dead Island and its infamous trailer, I'm going to remain skeptical about any non-gameplay trailers Deep Silver puts out.
Dead Island 2 gameplay trailer shows zombie freezing, chopping, and neck-snapping
10:00 PM on 08.11.2014