Play Lost Ark

Castle sieges of hundreds of players in Aden; the Korean MMO the clan wars of the 2000s were fought in.

A character creator people spend an evening in, combat built out of directional combos, and a trade network that runs while you are away.

A 2D side-scrolling MMO from Korea, free to play since 2003 and funded entirely by cosmetics.

Azeroth with millions; the MMORPG that swallowed a decade.

The browser MMO of school computer rooms; Old School RuneScape is still there.

The first big MMORPG, player-run houses and the murder of Lord British.

The Dark Portal opens onto Outland, blood elves and draenei join, and Illidan waits at the top of the Black Temple.

Northrend, the death knight as a playable class, and Arthas on the Frozen Throne at the top of Icecrown.