Systems designed to produce sequences of numbers or symbols that are, outside of random chance, unpredictable. Often shortened to RNG, random number generation is used in games to produce unpredictable effects, or to combine elements in unexpected and ever-changing ways. Roguelikes make liberal use of RNG to create their randomised dungeons and mechanical elements.

“Thanks to some loveable random number generation, The Binding of Isaac remains fresh after near-infinite playthroughs.”