You got a sound you enjoy hearing in a video game? Be it either the sound of a weapon, or simply your characters footsteps, feel free to post yours in the comments.
Personally I've always enjoyed the countdown timer of Halo Multiplayer when starting a game or respawning.
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The Vex, and TLW The zoom in sound of the binary rifle The sounds of critical hits in Chrono Trigger The saber in ME 3 The chocobos kweh in FFIX The battle rifle in Halo 3 The heavy nuke weapon in ME2 Mini nukes in fallout 4 and the following ding Just about all the ones from Contra, Castlevania, and Lifeforce. I'll just stop here...