'any good music games for PC ?

Beat Hazard for me is the best, Rhyhthm Zone and Audiosurf are pretty good too.

Try Symphony. It actually gives you a good reason to use your music in game with a simple story about demons corrupting your music for evil purposes. You have to shoot computerized monsters before they can corrupt your music. And each song you complete gives you a unique power-up for your ship.

Guitar hero: 3, Aerosmith and World Tour. And if you have the patience and dedication you can try playing them from your keyboard, holding it like a guitar.

Beat Hazard.

Rocksmith - the only real music game around, like the kiddos guitar hero except you plug in the guitar or bass and actually play, quite fun for a while. Learn a little while you play, but not really a complete teaching tool.

If you like chiptune, try Super Hexagon. Quite challenging; so simple but catchy.

Beat Hazard - Audiosurf - Symphony.

Sequence. Although it's more of a rhythm game than a music game it's very good. :)

Audiosurf is awesome.

+1 Beat Hazard

Frets on Fire

Audiosurf.

Beat Hazard FTW (especially in the dark ;-) , Audio Surf and Symphony

I like Beat Hazard and Sequence :>

Stepmania

Sequence is not a music game per se, but I enjoyed it immensely, have a look at it!

Get higher difficulty maps, try the "Years" one or get Sequence, or Beatmania, or Frets on Fire.

Ultrastar ... non Steam, but Free

You can beat insane difficulties, but can you S rank them? or get the Highest accuracy possible

Audiosurf

Since you came from OSU, I assume you're playing anime songs, Add me and I'll dethrone you in ever songs you play :D

I have not tried Beat Hazard.
Audiosurf is easy and nice.

Audiosurf, Beat Hazard.

Symphony, Beat Hazard and Audiosurf!

osu! is the best game :3
I suggest you Lunatic Rave 2, a BeatMania emulator.

Not so much something you can do right now, but I've been waiting for this game for a long time already. Hope it does get on steam someday. :)

FRACT OSC