The top results based on the latest update are Just Cause 2: Multiplayer Mod [Score: 2.4], Just Cause 2 [Score: 1.4] and Assassin's Creed Odyssey [Score: 1.3].
The top rated games you can find here are The Witcher 3: Wild Hunt [SteamPeek Rating: 12.7] ranked #10, Euro Truck Simulator 2 [SteamPeek Rating: 12.2] ranked #56 and Unturned [SteamPeek Rating: 11.8] ranked #166.
Also don't forget to check the newest releases Cyberpunk 2077 [Release date: 2020-12-09] ranked #163, Red Dead Online [Release date: 2020-12-01] ranked #180 and SNOW [Release date: 2020-11-11] ranked #175.
While it is tempting to play with the newest and the best, there might be some other gems in the results, like Far Cry New Dawn [SteamPeek Rating: 7.4] ranked #52, S.T.A.L.K.E.R.: Shadow of Chernobyl [SteamPeek Rating: 9.2] ranked #53 and Mafia II (Classic) [SteamPeek Rating: 9.6] ranked #54.