Open-source game servers

Survival, SMP, skyblock, anarchy and modpack servers on Paper, Fabric and Folia.

Vanilla, modded and 2x/5x/10x Rust servers with wipe schedules.

TShock and tModLoader servers, from vanilla to full modpacks.

Torch-powered survival and creative servers with plugin economies.

Voxel sandbox servers running community game modes and mod packs.

Open-world voxel RPG servers built on the Rust engine.

Command & Conquer, Red Alert and Dune 2000 multiplayer servers.

Long-running transport empire servers, vanilla and heavily scripted.

Historical RTS multiplayer lobbies and hosted matches.

Fast arena FPS servers: deathmatch, CTF and instagib.

Co-op and PvP factory-defence servers with custom plugins.

Co-op platforming and Teeworlds-derived race servers.

Aliens versus humans FPS/RTS hybrid servers.

Open-source kart racing servers and lobbies.

The open-source sandbox MMORPG and its community shards.

ioquake3 servers: CPMA, OSP, freeze tag and instagib.

Pre-CU, NGE and custom-rules SWG servers on Core3.

Homecoming, Rebirth and SEGS-based superhero shards.

NexusForever shards bringing back Nexus.

PSForever servers running the original three-faction war.

ACEmulator shards with classic and custom content.

Dawn of Light freeshards and classic-era realm-versus-realm.

WarEmu-based servers running Age of Reckoning.

MxoEmu and Hardline Dreams servers.

Astron-powered revivals of the Disney MMO.

Arcturus Morningstar hotels and retro Habbo servers.

Open RSC and Lost City servers running the earliest RuneScape.

Roleplay, race and deathmatch servers on the open-source MTA platform.

San Andreas multiplayer servers on the open-source open.mp server.

Multiplayer driving and destruction servers for BeamNG.

Blizzlike and custom realms from Vanilla through retail, on AzerothCore and TrinityCore.

Interlude to Essence servers on L2J and aCis cores.

Season 6 and modern-season servers, including the OpenMU stack.

Pre-renewal and renewal servers on rAthena and Hercules.

Classic and retail-era Aion servers.

Open Tibia servers on The Forgotten Server and Canary.

RSPS servers spanning every era of RuneScape and OSRS.

ServUO and ModernUO shards, classic and custom rulesets.

EQEmu servers from classic-era progression to full custom content.

Classic-era MapleStory servers, from low-rate v83 to custom worlds.

Community CS2 servers: retakes, deathmatch, surf and 1v1.

ReHLDS servers: classic, deathmatch, zombie and jailbreak.

Community TF2 servers: trade, MvM, jump and vanilla.

ElDewrito servers keeping Halo Online playable.