What bothers me about the game thing is that the author seems to be implying that they can tell that a game is using a PRNG. At worst, a game is going to be usi

What bothers me about the game thing is that the author seems to be implying that they can tell that a game is using a PRNG. At worst, a game is going to be using something like Mersenne Twister. While distinguishable from random noise through careful analysis, it's extremely unlikely that there are readily perceptible patterns in the output. And if you really do need unpredictable numbers for your game (e.g. online gambling, where good randomness is a security requirement), it's far more practical to use a CSPRNG, especially since one is built into your OS. The practical difference is negligible. If an attacker can predict /dev/urandom, we've all got much bigger problems.