[Prickle]

No. That restriction has been gone for a few years now.

I can run rimworld and quasimorph via steam at the same time, as an example.

[babuskov]

Only if you do it on the same computer. The restriction is still there if you try to, for example, run one game on your PC and another on Steam Deck.

[Zekio]

technically you can easily bypass it by using two accounts and use family sharing with the extra account