If you want to knock opposing penguins into the ice-cold drink below, you're going to need the latest Knockout codes. These are generally good for a couple of free spins apiece, but a stack of free disco balls or a free skin could also be yours. If you're quick to the trigger, that is. Knockout on Roblox has a simple premise. Choose your penguin, get onto the ice, and be the last flightless bird standing. In Knockout, everyone picks the direction to fling their flapper. Once set, the penguins launch accordingly, bouncing, sliding, or falling until only one penguin remains. It's a little like rock, paper, scissors, but with penguins. Sort of.