Actually this game is under a Double Blind RNG. You have a really rare chance of getting a random legendary drop. Then another really random chance of that drop not being green gloves. It's an infuriatingly dumb system in an otherwise cool shooter. Rng means your reward is generated from a pool or loot table and is a randomly selected item from that pool. Location or activity-based means you obtain that exact item every time you complete that specific activity or go to that location. Notably in the context of Pokemon and other RPG-esque games (although not in the context of speed running), RNG is also commonly used to refer to (P)RNG abuse, that is, calculating and forcing specific 'random' outcomes thanks to the fact that RNGs aren't actually generating truly random numbers, but rather pseudo-random numbers which only look random. – scenia Apr 3 '15 at 16:54.