My Combat Patrol mission (link in signature) does a little bit of this. Basically, I play music when you contact the enemy. If the enemy surprises you, one type of music is played; if you surprise them, another song is played. I also have a custom death sequence, which is always nice. Your teammates cry out when they are killed, and if they die next to you, a little cutscene is played in slo mo.
Unfortunately, not everyone likes music when they are playing though, so it is good to add an option to disable it.