Crestwave

PvE Deadlock already exists—it’s called Risk of Rain 2.

The two games actually have a decently similar feel and it’s no surprise that Valve eventually hired some of the RoR2 devs.

These are good points, but modern PvP games still support custom matches and going from there to self-hosted servers isn’t really much of a leap.

In fact, I believe Valve’s new game Deadlock does let you run your own dedicated servers.

Don’t Starve Together scratches the MMO itch for me. It’s not an MMO, but there are public servers where you can hop in and hang out, raid bosses and whatnot. I have ~4k hours in it now.