Buffy the Vampire Slayer: Chaos Bleeds is a 2003 video game and the fourth video game based on the Buffy the Vampire Slayer franchise. It is the first multiplatform game in the franchise as well as the first game in the franchise to allow players to control characters other than Buffy and also the first game in the franchise to feature a fully-developed multiplayer mode (additional players had a limited ability to interact in a hidden debugging mode in the previous title: Buffy the Vampire Slayer).

The game was written by Christopher Golden and Thomas E. Sniegoski. The story is set during the television series' fifth season, between "Forever" and "Intervention", occurring after Buffy's mother's death. The game also includes many references to previous episodes of both Buffy and Angel, including Faith being in jail and Giles' days as Ripper. The game extends the previous game's idea of bringing back dead characters (the Master returned in the previous game), by bringing back Sid the Dummy, Kakistos and Anya's former demon self, Anyanka.

Unlockables

Unlockable Arenas
Beat the level at the listed rank to unlock the multiplayer arena.

Cemetery - Beat level 2 with "Slayer" rating

Initiative - Beat level 8 with "Slayer" rating

Quarry - Beat level 11 with "Slayer" rating

Unlockable Characters
Beat the level at the listed rank to unlock these multiplayer characters.

Abominator - Beat level 10 with "Professional" rating

Bat Beast - Beat level 4 with "Professional" rank

Cemetery Arena - Beat level 2 with "Slayer" rank

Chainz - Beat level 10 with "Slayer" rating

Faith - Beat level 8 with "Professional" rating

Female Vampire - Beat level 1 with "Slayer" rank

Joss Whedon and/or Chris - Beat level 12 with "Professional" rating for Joss Whedon, or "Slayer" rating for Chris

Kakistos - Beat level 9 with "Slayer" rating

Male Vampire - Beat level 1 with "Professional" rank

Materani - Beat level 5 with "Professional" rank

Psycho Patient - Beat level 6 with "Professional" rating

S&M Mistress - Beat level 7 with "Slayer" rating

S&M Slave - Beat level 7 with "Professional" rating

Sid the Dummy - Beat level 6 with "Slayer" rating

Tara - Beat level 3 with "Slayer" rank

Zombie Demon - Beat level 3 with "Professional" rank

Zombie Devil - Beat level 4 with "Slayer" rank

Zombie Gorilla - Beat level 11 with "Professional" rating

Zombie Skeleton - Beat level 2 with "Professional" rank

Zombie Soldier - Beat level 9 with "Professional" rating

Unlockables

Beat the level listed at any rank to unlock.

Amber Benson Interview - Beat level 2

Amber Benson Voice-Over - Beat level 8

Anthony S. Head Interview - Beat level 1

Anthony S. Head Voice-Over - Beat level 7

Chaos Bleeds Comic Book - Beat level 5

James Marsters Voice-Over - Beat level 6

Joss Whedon Voice-Over - Beat level 11

Nicolas Brendan Interview - Beat level 3

Nicolas Brendan Voice-Over - Beat level 9

Outtakes - Beat level 12

Robin Sachs Interview - Beat level 4

Robin Sachs Voice-Over - Beat level 10

Here's the game's trailer, in case you wanted to find out more details about it: