Looks like Portal 2 is the first Steam Deck Verified title

As we come closer to the February launch date of the Steam Deck, it appears Valve are now starting to actually go through and tick titles for their Deck Verified program.

Read the full article here: https://www.gamingonlinux.com/2022/01/looks-like-portal-2-is-the-first-steam-deck-verified-title