The Battle of B-R5RB or the Bloodbath of B-R5RB (/ˈbiː tæk ɑːr faɪv ɑːr ˈbiː/ ) was a massive-scale virtual battle fought in the MMORPG space game Eve Online in January 2014 (YC 116 in-game), possibly the largest player-versus-player battle in gaming history at the time. The 21-hour-long conflict pitted the Clusterfuck Coalition and Russian alliances (CFC/Rus) against the N3 Coalition and Pandemic Legion alliance (N3/PL), and involved over 7,548 player characters with a maximum of 2,670 players in the B-R5RB system at one time. The in-game cost of the losses totaled over 11 trillion Interstellar Kredit (ISK), an estimated theoretical real-world value of US$300,000 to $330,000 (equivalent to between US$393,053 and $432,359 in 2024), as derived from the contemporaneous market value of PLEX, an item purchasable with real currency that can be redeemed either for subscription time or traded for in-game currency.
Part of a larger conflict known as the Halloween War, the fight started after a single player controlling a space station in the N3/PL-controlled star system B-R5RB accidentally failed to make a scheduled in-game routine maintenance payment, which made the star system open to capture. Being a key staging area used by N3/PL in the war, the CFC and Russian coalitions began pouring players into the system in a swift offensive, and N3/PL moved in a large fleet of players as a response. A massive battle erupted in the system, and numerous smaller engagements occurred throughout the game universe as players attempted to block reinforcements from joining the battle. CFC/Rus gained a clear win by inflicting heavy losses on N3/PL and successfully capturing B-R5RB. The losses totaled 576 capital ships, including 75 Titans (the largest ships available to players), along with thousands of smaller vessels.
