The game can be played alone, but also supports two-player cooperative play through split-screen (on consoles), and up to four players playing cooperatively online or over LAN. The game follows the progress of the host player, rewarding the other active players for completion of quests for their characters. If the other players are doing the same quests in their campaign, the completed quests remain the same in their campaign as well as the host's. When more players are present, the game alters the statistics of the generated enemies, balancing the game due to the larger number of players. Players can take part in one-on-one duels anywhere in the game world, or can visit arenas in the game world to participate in free-for-all, 2-on-2 or 3-on-1 combat battles with their fellow players. The original title as shipped for Windows used GameSpy servers for multiplayer modes; as a result of GameSpy's shutdown in 2013, 2K Games patched the game and moved the servers to Steam, as well as providing Steam-versions of the game for those that purchased the title through retail channels.