Hello @shoober420, this issue report is invalid because you've disabled the Steam runtime, which is not a supported configuration. Also, the functional implications of using libva1 is being tracked at #5339.
Closing in favor of the existing issue report.
https://gist.github.com/shoober420/1215c40214cf70e1fabb760b5bd2a341
Steam requires the old libva1 package (1.8.3) to launch successfully, even if the most recent libva package (2.4.1) is installed, both 32bit and 64bit. Steam shouldnt require legacy libraries to function.
Steps for reproducing this issue: