What bothers me about the game thing is that the author seems to be implying that they can <i>tell</i> that a game is using a PRNG. At <i>worst</i>, a game is going to be using something like Mersenne Twister. While distinguishable from random noise through careful analysis, it&#x27;s extremely unlikely that there are readily perceptible patterns in the output.<p>And if you really do need unpredictable numbers for your game (e.g. online gambling, where good randomness is a security requirement), it&#x27;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 &#x2F;dev&#x2F;urandom, we&#x27;ve all got much bigger problems.