Games like Achaea, Dreams of Divine Lands

Imperian is the third MUD developed by Iron Realms Entertainment, and has a much larger focus on PK/PVP than other IRE games. In common: rivaling factions, player vs player, multi user dungeon.

Aetolia is a multiplayer RPG (role-playing game) set in a gothic-fantasy world. In common: multi user dungeon, mud, microtransaction.

Lusternia is a text based multi-player game (sometimes called a MUD). In common: multi user dungeon, mud, microtransaction.

Talewyn Harbor is a free-to-play multiplayer browser game set in a persistent coastal world. In common: sailing, fishing, open world.

Starmourn is a science fiction themed MUD. In common: multi user dungeon, mud, microtransaction.

The Unofficial Squaresoft MUD is a free online text-based fan-game, which is based on the worlds and combat systems of various Squaresoft games. In common: multi user dungeon, mud, open world.

RuneScape is a high fantasy open world MMORPG. In common: player vs player, open world, free to play.

Arcmaze is a free-to-play browser 3D MMORPG with first-person view and grid-based movement set in dark fantasy medieval world with multiple dungeons. In common: player vs player, open world, free to play.

Gemstone IV is a text-based online roleplaying game developed by Simutronics and launched in November 2003. In common: multi user dungeon, mud, text adventure.

An abandoned MUD (Multi User Dimension), unearthed by hackers in the year 2017 where you play as a wizard in a once lively MMO world. In common: mud, fishing, free to play.