Just the game. If it’s like Dark Souls with no bkgd music, then nothing cause I’m fighting for my life at every corner and if I have the luxury to listen to music, I’m not sweating hard enough. If it’s a shooter, I need them ears. If I’m grinding something like in Warframe, I listen to the game dialogue (this gets old after a few weeks), kill sounds, guns, slashes, bkgd music, bullet jumping noise. Friend commentary works if I’m in a party though. [spoiler]Or I focus on not dying, cause it’s Steel Path Circuit and I forgot to kit my joke-of-a-pick Excal Umbra towards any form of high level survivability, and none of my chosen guns (or melee) are heavy enough hitters to do anything bigger than three digits towards the level 100+ (and increasing) goofus heavy units. [/spoiler]