Custom Private Servers

Custom covers everything from light changes to a different game. At one end are blizzlike realms with quality-of-life additions: cross-faction grouping, transmog on an old client, playerbots. In the middle are servers that keep the leveling game but add content, such as new bosses, retuned raids or extra zones. At the far end are projects that replace core systems: classless talent builds, level 255 caps, five-player raid retunes, permadeath, or survival rules with full loot.

Most custom private servers are built on WotLK, because the 3.3.5a client is the easiest to modify and has the deepest developer tooling. Vanilla, TBC and Legion have a few custom projects each.

Decide how far from the original game you want to go. Frostmane keeps 1x WotLK leveling and adds custom PvE endgame; WoW MasterWork adds custom endgame, including new legendary weapons, at x7 rates; Unlimited WoW is a level 255 funserver; The Last Crusade turns Azeroth into a full-loot survival game with free-for-all PvP outside Dalaran. All four are custom, and they have almost nothing else in common.

Custom projects live or die by a small team, so check the changelog and Discord for recent updates, whether the custom content is documented anywhere, and what reviews say about balance and the shop. Custom servers are also where instant max level is most common; the instant endgame page collects those. If you would rather have the original game with as few changes as possible, the blizzlike realms are the opposite end of the spectrum.