Abyss Online
UncertainPre-alpha / Early Access-era development
A PvP-oriented sandbox MMORPG set in Aeternea, built around player choice, crafting, building, strategic play and a community-driven economy.
PvPBuildingCraftingPlayer EconomyOpen WorldBuy-to-play
Anvil Empires
In TestingPre-Alpha / Steam Playtest; release TBA
A massively multiplayer medieval war sandbox where thousands of players build shared settlements, maintain logistics, raid, siege and fight for conquest across a persistent world.
BuildingSettlementsSiegesLarge-scale PvPLogisticsTerritory Control
Arcfall
In TestingNot documented
A previously playable classless sandbox MMORPG now undergoing an Unreal Engine rebuild.
SandboxPersistent World
Ashenmere
In TestingEarly alpha; actively developed in 2026
A Godot-built open-world MMORPG inspired by Lineage 2 and classic sandbox MMOs, with persistent multiplayer, clans, player trading, PvP/karma, towns, raid bosses, fishing and player-sailable pirate ships.
Open WorldPvPGuildsTradingFishingNaval Combat
Eris Online
In TestingPlayable development build / alpha-era development
A browser-based dark-fantasy sandbox MMORPG inspired by Shadowbane, centered on political alliances, territorial conquest and open-world PvP. Recent builds added base building, guilds, territory ownership, war declarations, player trading and merchant NPC shops.
Open PvPTerritory ControlPoliticsGuildsBuildingPlayer Economy
Eternal Tombs
In TestingLaunch planned for early 2027; testing continues through 2026
An upcoming sandbox MMORPG where live Tomb Masters dynamically change the world and run events, alongside player shops, crafting, sieges, war operations, exploration, raids and opt-in PvP.
Dynamic WorldLive GMsPlayer ShopsCraftingSiegesPvP
EVE Frontier
In TestingIn development; currently playable through Founder Access; launch date unannounced
CCP's in-development survival MMO set in the wider EVE universe, focused on exploration, mining, building, combat, survival and player-created systems in a living galaxy.
SpaceSurvivalBuildingMiningPvPModding
Mithrall
In TestingIn development / Alpha
An open-world dwarven survival MMO combining resource warfare, player economy, building, taming and territorial conquest.
BuildingPlayer EconomyTerritory ControlPvPPvETaming
Profane
In TestingTBA; Closed Alpha recruitment
A player-driven sword-and-sorcery sandbox MMORPG with no classes or levels, open building, territorial conquest, taxes and full-loot PvP.
Full LootOpen PvPBuildingPlayer CitiesTerritory ControlTaxes
Pure Hearts
In TestingTo be announced
An upcoming social fantasy sandbox MMORPG built around city allegiance, professions, politics, trade, clan warfare and a player-driven economy, with seasonal world resets that create new political and economic starts.
Player EconomyPoliticsCitiesCraftingFarmingPvP
Reign of Guilds
In TestingReleased November 26, 2025; Early Access began April 4, 2024
A guild-focused medieval sandbox MMORPG inspired by old-school MMOs, with open PvP, professions, crafting, political ranks, castles and kingdom-scale economic and territorial conflict.
GuildsOpen PvPPoliticsCraftingTerritory ControlKingdoms
Ruin
In TestingPlayable indie release / ongoing development
A small indie sci-fi survival sandbox MMORPG about colonizing a hostile alien world. Its playable builds include terraforming, survival systems and downloadable official server software, with Windows as the current platform.
TerraformingSurvivalSci-FiPersistent WorldFree-to-play
SamuTale
In TestingNot documented
A feudal-Japan-inspired open-world sandbox MMORPG built around player housing and village construction, farming, crafting, trading, skill-based character builds and full-loot PvP in a persistent living world.
Full LootBuildingPlayer VillagesHousingFarmingCrafting
SEED
In TestingEarly Access launched July 21, 2026
A persistent society-simulator MMO where autonomous Seedlings continue living and working while players are offline. Thousands of players build settlements, businesses, economies, laws and governments together on one shared planet.
Single ShardPlayer EconomyPoliticsBuildingAutomationPersistent World
Sigma World: Foundation
In TestingNot documented
The newer Sigma World project, tracked separately from its legacy predecessor.
TerraformingBuildingCraftingPlayer EconomyPersistent World
Spawn World
In TestingIn development
An Unreal Engine 5 PvPvE sandbox MMORPG built around open-world full-loot PvP, skill-based combat, factions, settlements, territory wars and a player-driven economy, with no traditional levels or classes.
Full LootOpen PvPPlayer EconomyClasslessSettlementsTerritory Control
Stars Reach
In TestingIn playtesting / development
An in-development science-fiction sandbox MMO focused on player-shaped planets, terrain manipulation, building, resource simulation, crafting, social systems and persistent worlds.
TerraformingBuildingCraftingPlayer EconomyPersistent WorldSci-Fi
Torebia: Island Odyssey
In TestingNot documented
Torebia: Island Odyssey is a fantasy sandbox MMO project currently listed as in testing. Some historical details are limited or no longer available from first-party sources.
SandboxPersistent WorldCrafting