We've found 46112 games on steam.
Unfortunately, just 18.1% of all games on Steam work on Linux:
A better number can be obtained by looking at the total playtime. 70.6% of all playtime on Steam is in games that work on Linux:
Note: this only includes the playtime of profiles that we've scanned.
Some things to note here:
This site is not affiliated with Wine and/or Steam.