Like when you play a game with background music and you KNOW you'll remember it because it's so awesome, maybe because it fits the game really well or just because it's catchy as fuck?
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Nfs Underground 2 - Riders on the Storm (Snoop Dogg)
Roller Coaster Tycoon 2 - Caroussel themes
Terraria - Daylight theme
Simcity 4 - Traffic Jam theme
Favourite game themesongs
1 
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oxytamine

I would list them with links, but this is getting a very long post. So below I'm just going to post song names (the names above them are the game bosses).