this is a epic song but i dunno if it would be nice as ringonte i would use it :D

Also try songs from max Payne 3 OST, I used them a lot

Such as combat drugs, tears etc.

This is the most epic ringtone I've ever heard :D

https://www.youtube.com/watch?v=RhLq_kQGog8

https://www.youtube.com/watch?v=baHbJCX1OO0

I use Audacity to select the part of the song i want and then i extract it to a mp3 and i add it to my phone. All process takes about 5 minutes.

The Dragonborn Comes - And you need to scream "For Sovngarde" tho

https://www.youtube.com/watch?v=3kiypaRzbQI - How about this? Saints Row 3 official ringtone, it is what i use.

Use Legend of Grimrock OST.
It's awesome song, maybe not that good ringtone but my only idea.

These songs from Real Boxing are pretty awesome:
https://soundcloud.com/vivid-games/japan-theme-trap-remix /
https://soundcloud.com/vivid-games/entrancetheme-unitedstates2 /
https://soundcloud.com/vivid-games/entrancetheme-unitedstates1

I use this one, but I used to have this one.

Calling from The World Ends With You

Calling from the game The World Ends With You fits.

I have some tune from Watchdogs, I didn't even played the game but I love it.

Watch Dogs OST Waiting For A Sign [ Instrumental ]
https://www.youtube.com/watch?v=B68GLzI-6EY

I cut it so the ringtone start somewhere around 2:40.

all hail King Carlest and his Disney Princess!

I had a song from Portal 2 as ringtone for a while it was the Turret Wife Serenade. And for messages I had the sound of when you press the red buttons [Button Positive] to throw the cubes etc.

Payday - Gun Metal Grey
http://youtu.be/pfwQlqXWgME

Child of Light OSTs are amazing, and I think they would make amazing ringtones as well
Also, For River from To the Moon
Robots FTW and Turret Wife Serenade from Portal 2
Organon Hymm from Goodbye Deponia (lol)

Silent Hill from Silent Hill
Theme of Laura from Silent Hill 2
You're Not Here from Silent Hill 3
Setting Sail, Coming Home from Bastion
We All Become from Transistor
Still Alive from Mirror's Edge
Exile Vilify from Portal 2
Main Theme from Battlefield 1942
Awakening from Space Rangers
Main Theme from Assassin's Creed 4: Black Flag
M4 Part 2 from Mass Effect
Main Theme from Trine 2
UNATCO from Deus Ex
Icarus from Deus Ex: Human Revolution
Falling Into a Dream from Far Cry 3

This one www.youtube.com/watch?v=uyJe8SazCo4 somewhere ~1:00 best ringtone ever

I currently use The Wolf Among Us - Opening Credits

http://youtu.be/s5fUwjdeSHE

my old ringtone My Heaven, im thinking of making this the next one

I use the Saints Row 3 ringtone. Makes me feel all gangsta.

Mine is the music of the song Gangnam Style.

just saw you needed game music. sad :(

My ringtone is from Klonoa, here ^^

https://www.youtube.com/watch?v=55c5ekNaMt8&index=9

my brother uses "promise (reprise)" from the silent hill 2 OST, sounds good
edit: just the part starting at ~0:12
https://www.youtube.com/watch?v=ulwVN4LkgaI