MTV's Celebrity Deathmatch is a video game based on the Celebrity Deathmatch show. The game features celebrities and movie monsters as playable characters. It was generally poorly reviewed. There are 27 total characters: 20 from the start and 7 unlockable.

The television show is a claymation parody that pits celebrities against each other in a wrestling ring, almost always ending in the loser's gruesome death. It is known for its excessive amount of blood used in every match and exaggerated physical injuries (e.g., one person pulls off a participant's foot, living through decapitations, impalements etc). (Wikipedia)

UNLOCKABLES

Adam Sandler
Enter Adam Sandler as a name in Make A Character mode.

Alien
Successfully complete Episode 5 with a "Perfect" rank.

Cousin Grimm
Successfully complete Episode 1 with a "Perfect" rank.

Frankenstein
Successfully complete Episode 2 with a "Perfect" rank.

Gladiator Nick Dimond
Successfully complete Episode 6 with a "Perfect" rank.

Mummy
Successfully complete Episode 3 with a "Perfect" rank.

Wizard Johnny Gomez
Successfully complete Episode 6 with a "Perfect" rank.

Wolfman
Successfully complete Episode 4 with a "Perfect" rank.

Graveyard ring
Successfully complete Episode 4 with a "Perfect" rank.

Spaceship ring
Successfully complete Episode 5 with a "Perfect" rank.

Tomb ring
Successfully complete Episode 3 with a "Perfect" rank.

Unlocking fatalities
In Death By Elimination, there will be a series of characters. Defeat all of them and you will get your character's fatality. Complete it twice and you will get his or her second fatality.

GAMEPLAY HINTS

Fatalities

When certain conditions are met, each fighter can perform an alternate fatality. For example:

Head Rip: Kill your opponent when they have lost both their legs.
Anvil Drop: Kill your opponent when your fighter has lost both their legs.
Matrix Decapitation Kick: Kill your opponent when your fighter has lost both their arms.

Cut off the celebrity's arms or legs to do an alternate death kill. For example, Carmen Electra has saws. Keep hitting the other celebrity with the saws and either the arms or legs will fall off. Please note: Once you take off a celebrity's arms or legs, they use an attack that throws them at you. Although it does not take off too much damage, you will not be able to block the attack.


Here is one fight from the MTV Celebrity Deathmatch (the TV series), between James Hetfield vs. Fred Durst: