Scum

VS

Outriders

Scum is a multiplayer open-world survival game developed by Gamepires and originally entered Early Access in 2018. While it is not a full MMO, it supports servers with dozens of players (up to 64 per server). The game maintains a niche but dedicated following and is frequently updated; however, it has never reached large mainstream status. Based on long-term trends of similar survival games, its daily active player base is estimated to be in the low thousands, and this estimate would hold unless a major relaunch or expansion revitalized the player base.

Outriders is a co-op looter-shooter released in 2021 by People Can Fly and published by Square Enix. While it had a strong launch, concurrent player numbers have declined significantly since release. The game is not an MMO, as it centers around instanced co-op play (groups of up to three), not a persistent open world with massive players. Based on trends typical for similar games 2-3 years post-launch, estimated daily active players are in the low thousands across all platforms.