If there are new/upcoming titles that support cross-play with Steam, feel free to list it down here. You may also add in any existing Steam games that developers had updated to support cross-play as well

Originally posted by Jawshey:

Warframe now has Cross-Play: https://www.warframe.com/crossprogression

Warframe is now updated as a Recommended Steam title

Originally posted by Rudey:

Wildmender has cross-platform play between Steam, Xbox and PlayStation.

https://steamcommunity.com/app/1599330/discussions/0/3880470997346925695/

Wildmender has now been added

While true, the general idea is to highlight currently known games that are only Steam-crossplay compatible with PlayStation and no other console platforms. The games that are currently crossplay compatible with Steam and all 3 console platforms (PS, Xbox, Switch) are not grouped into any particular list.

With the case of of No. 2, as certain titles can only cross-play between Xbox and the MS Store version instead of Steam, it aims to help people to identify such games in case they might have unknowingly purchased the wrong platform thinking that it would cross-play with Xbox (as with the case of Deep Rock Galactic).

I'm open to suggestions on improving the classification of titles of 1 and 2 though