In video games, music plays a big part. We remember many themes such as 'Super Mario Bros.' or 'Angry Birds'.
These days we have many orchestrated video game themes which we associate with the game itself so we end up loving the theme, even if it's a genre we normally hate (I like orchestrated music normally).
My favourite video game for music is Super Mario Galaxy 1 & 2, much of it is orchestrated and it just sounds amazing. The music is taken very seriously in this game (unlike other Mario games (except Super Mario 64)).
Here's the credits theme for Super Mario Galaxy (1):
I am aware that there are many other video games themes which people may think sounds great so just post pretty much anything about video game music.