Unlock Tower Tooth Challenge Level

Beat the game with five characters on any difficulty and you will unlock the Tower Tooth Challenge level in Challenge Mode. You play as Tower Tooth and fight against 5 opponents in the Colliseum.
NOTE: You Tower Tooth is only playable in this challenge.

Contributed by: Karrat 

Secret mini game in L.A. Level

On the West side of the level (oposite end of the teleporter pad to sign) there's a teleporter pad in one of the buildings. Just shoot the doors and then stand on the pad to unlock the Solom mini game.

Contributed by: wolverinefan 

Secret mini game in Rome

Climb to the top of the building and turn right and go all the way to the end and you will find a teleporter that leads to the secret mini game.

Contributed by: wolverinefan 

Mini game in Greece

Get onto the large ship and you'll find a path that leads to the bottom of the ship, go either dirextion but don't go on the lift, instead try going towards the other side of the ship and you'll see the teleporter that takes you to that levels secret mini game.

Contributed by: wolverinefan 

Secret mini game in Monoco level

Have the lake behind you (bleachers area) and drive to the right. You'll com to a grassy area to your right and the teleporter is there for the mini game.

Contributed by: wolverinefan 

Secret mini game in Paris

Near the center of the level, go to what looks like a museum and shoot the doors off. The teleporter to the mini game is located in there.

Contributed by: wolverinefan 

Secret mini game in Egypt

Blow up one of the statues and a secret passageway is behind it. Follow it and it leads to the teleporter for the mini game.

Contributed by: wolverinefan 

Secret mini game in Tokyo Streets level

From the starting point head straight and when you reach the hill, take your first right and the teleporter for the mini game should be in the middle of the street.

Contributed by: wolverinefan 

Secret mini game in Russia level

Find the large bell and keep shooting it until it opens. Enter and you'll find the teleporter to the mini game in there.

Contributed by: wolverinefan 

Secret mini game in Tokyo Rooftops level

The teleporter to the mini game is located in the building behind the "TOKYO LTD" sign.

Contributed by: wolverinefan 

Secret mini game in Big Blue Stadium level

In one of the cornors is a glass window, shoot it and enter, inside is another set of windows, shoot them out and inside is the teleporter to the mini game.

Contributed by: wolverinefan 

War of the Monsters Posters

In the Los Angeles level, there are some posters on the wall of the studio next to the water tower. They are both movie posters seen at the loading screens in Incogs other game, War of the Monsters.

Contributed by: PS2112 

Playing multiplayer with one game

If you want to play Twisted Metal: Head On with other PSP players around you but only have one copy of Twisted Metal, here's how you can do it:

1.Load up Twisted Metal on PSP number 1.
2.Create a game on Ad Hoc mode and start the game.
3.After the game loads, take out disk.
4.Put game in another PSP and load up game and join the multiplayer game that's been created and Join in and load up the game.

Now you both will be able to play the game in multiplayer mode. This trick can work for more than two players but the max number of players possible is 6.

Contributed by: black 13 

Killing The Big Blue Stadium Music

During story mode, go up to the stage where the band is performing and blow them up ( The napom beside them works perfectly ). The moment they are killed, the song will stop playing and will be replaced with a different, lyricless song.

Contributed by: Bendilin 

Destroying the Eiffel tower.

In the Paris level, use the teleporter that leads to the top of the eiffel tower, than lead a remote bomb near one of the beams at the top, jump off, and use it! This will destroy the tower and allow access to some buildings and weapons!

Contributed by: ghettocloud5 

Total Destruction in Russia

If you shoot the four consoles next to the tanks in Russia you can make them launch missiles that will destroy some building anjd allow you to access buildings and weapons!

Contributed by: ghettocloud5 

Destroying the Tokyo Tower and entering the dojo

In the Tokyo Streets level, goto the big red Tokyo Tower. Use a remote control bomb on the side of the tower. It'll blow up the tower. Blowing up the tower will leave a bridge, connecting to the dojo (behind the teleporter on ground level). At the dojo is health and other weapons.

Contributed by: Xanarki 

Limitless weapons

In Game

Contributed by: Chaos06 

continuos and homing Machine Gun

In game

Contributed by: Chaos06 

Unlockable Vehicles

Complete Specified Tasks To Unlock Following Vehicles

Contributed by: Karrat, TagThisTsT, RaumeRVZ 

Unlockable Vehicles

Complete Specified Tasks To Unlock Following Vehicles

Contributed by: RaumeRVZ 

Unlockable Battlegrounds

Complete Specified Tasks To Unlock Following Battlegrounds

Contributed by: RaumeRVZ, Karrat, TagThisTsT 

Unlockable Battlegrounds

Complete Specified Tasks To Unlock Following Battlegrounds

Contributed by: RaumeRVZ 

Codes

Enter these codes in-game to perform the corresponding attack.
Freeze Attack - Freezes closest opponent
Rear Attack - Fires selected weapon backwards
Flak Attack - Intercepts and destroys any incoming missile and will knock back enemies that are in close player proximity
Napalm Attack - Adds a napalm projectile to any weapon fired (does not work with specials)

Contributed by: scroungelo 

Health Recharge

In game

Contributed by: jenkinsm 

Cheats

These must be entered during gameplay.

Contributed by: FireBird624, TagThisTsT, tacklebeast, Arkturus 

Weapon Power-up

You can only enter the code while your playing in story mode. There is a glitch that for some reason this doesn't always work. If it won't work, you have to make another guy and a new story and try it again. It took me 12 times until I finally got it.

Contributed by: AntiUsed 

Twisted Metal: Lost Unlockables

Successfully completing Twisted Metal: Lost under certain difficulty levels will unlock secret characters and a secret level. The Port Of Death is not playable in Story mode.
***12-Pac, Gold Tooth, and the Port Of Death are not selectable in the Twisted Metal: Head On portion of the game.***

Contributed by: WurdMan 

Twisted Metal: Lost - Unlockable Vehicles

Complete Specified Tasks To Unlock Following Vehicles

Contributed by: Bl3u 

Hidden characters.

To unlock the following characters, complete the Bonus Mini-Game in the corresponding level.

Contributed by: Warhawk, brunbbmerc 

Twisted Metal: Head-On - Unlockable Vehicles

Complete Specified Tasks To Unlock Following Vehicles

Contributed by: Bl3u 

Twisted Metal: Lost - Unlockable Battlegrounds

Complete Specified Tasks To Unlock Following Battlegrounds

Contributed by: Bl3u 

Twisted Metal: Head-On - Unlockable Battlegrounds

Complete Specified Tasks To Unlock Following Battlegrounds

Contributed by: Bl3u 

Unlockable Levels

Contributed by: sirrojen, Deku Boy 

In Game Cheats

Hold L1&R1&L2&R2 during gameplay then press the button combination. Do the same thing to turn it off.

Contributed by: Renaissance247 

Tower Tooth Challenge in Head-On

Note: You can only use Tower Tooth in Rome Death Match. In challenge mode you are given preselected opponents. In Vs Mode you can also use him, but only in Rome Death Match

Contributed by: Deku Boy