For example in forza, the game plays engine sounds based on how much we press the button. Are there different sequences of clips ? If yes how do they blend so well ? Or are they synthesized dynamically ?
There are so many parts to it as well - when the gear shifts, when you suddenly slow down at high speed, when you suddenly accelerate from stop. They all seem very realistic.
Don't forget about Diarrhea Zero and the next gen remakes for 1 and 2. Also, there's the ARG in the DFW airport bathrooms back in the early 00s. There's also the previous series Diarrhea is based on, The Skids.