If you're interested in a free game that has had this core functionality (online multiplayer Asteroids) since 1995 - visit https://store.steampowered.com/app/352700/Subspace_Continuum... (edit: replaced with Steam link) There has been a dedicated community of thousands of players, many of which have been playing well over a decade. Plenty of videos on youtube under either "Subspace" or more recently "Continuum". http…
Can I ask what the compelling gameplay is of this game, where people spend thousands of hours on it? From a distance it doesn't seem like e.g. a bit persistent world, but more of an arena, short one-off games kinda thing; I find it hard to comprehend you could spend thousands of hours on that.
Essentially: distill gameplay to a relatively small number of rules + iterate balance until it's incredibly finely tuned + let the playerbase go nuts with whatever strategies they can come up with.
The attraction being that they're easy to pick up (few rules to learn) but incredibly deep (complex interactions and strategies).
Coupled with the fact that circa-late-90s, the idea of an MMO was still mind blowing. Games with friends and strangers?!
From memory, SubSpace also had a fairly addictive loot mechanic (tiered materials, item construction, randomly timed rare enemy spawns).