In the Battle of Nitropolis series, it's the rodents' turn to enact revenge on Sergeant Nitro Wolf for putting them in prison in Rogue Rats of Nitropolis. That means collecting everything from diamonds to raiding depots in a bid to boost their supplies. Join them on their journey, and you might find free games and a Super Bonus along the way. Game details: ELK Studios Slots, scatter symbol, wild symbol, free games, bonus round, feature round, rats, Nitropolis, apocalypse.