For games you don't need randomness; you need a function that returns next in a series of uniformly distributed numbers (which RNGs happen to satisfy). But more

For games you don't need randomness; you need a function that returns next in a series of uniformly distributed numbers (which RNGs happen to satisfy). But more importantly, you do need determinism, for the reasons I stated above. We're calling that function "random" for the same reasons we'd call another function "dial", even though there's no telephone involved.