1895 Notre Dame Paris Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Notre Dame as a playable character in arcade mode.

1920 Aztec Ruins Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Stone Golem as a playable character in arcade mode.

1932 Chicago Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Big Tony as a playable character in arcade mode.

1972 Atom Smasher Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Khallos as a playable character in arcade mode.

1990 Oblask Dam Siberia Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock the Mutant TimeSplitter as a playable character in arcade mode.

2019 NeoTokyo Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Sadako as a playable character in arcade mode.

2280 Return To Planet X Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Ozor Mox as a playable character in arcade mode.

2315 Robot Factory Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Machinist as a playable character in arcade mode.

2401 Space Station Level Reward
Successfully complete the level in story mode under the medium difficulty setting to unlock Reaper Splitter as a playable character in arcade mode.

Ending Bonuses
Successfully complete the game in story mode under the easy difficulty setting to unlock the Cardboard Characters cheat, Unlimited Ammo cheat, and the Streets multi-player level in arcade mode.

Successfully complete the game in story mode under the normal difficulty setting to unlock Big Heads and All Characters Cloaked cheats and the Compound multi-player level in arcade mode.

Successfully complete the game in story mode under the hard difficulty setting to unlock the Site multi-player level in arcade mode.

Arcade League (Amateur) Bonuses

Beginners Series
Adios Amigos!: Hector Babosal, Lean Molly (Gold)
Casualty: Dr. Peabody, Crypt Zombie (Gold)
Top Shot: Hangar Level, Sgt. Shock, Elimination mode (Gold)
Mode Madness
Chastity Chased: Regeneration mode (Gold)
Shrinking from the Cold: Private Sand, Sgt. Slate, Shrink mode (Gold)
Scrap Metal: Scrapyard, Chassisbot (Gold)
It's A Blast
Night Shift: Sentry bot, Leech mode (Gold)
Spoils of War: Meezor Mox, Thief mode (Gold)
Demolition Derby: Male Trooper, Female Trooper, Robot Factory Level, Vampire Mode (Gold)
Too Hot to Handle
Monkey Immolation: Crispin, Flame tag (Gold)
Disco Inferno: Louie Big Nose, Lt. Wild (Gold)
Burns Department: Undead Priest, Nightclub, Virus mode (Gold)
Team Series A
Club Soda: Slick Tommy, Jimmy Needles (Gold)
Station Stand: Lt. Shade, Zones mode (Gold)
Men in Gray: Accountant, Kawer, Assault mode (Gold)
Arcade League (Honorary) Bonuses

Maximus
Cold Corpse Caper: Cyber Fairy, Gargoyle (Gold)
Killer Queen: Leo Krupps (Gold)
R109 Beta: Ufopia, Gladiator mode-Bronze

Elimination Series
Baking For The Taking: Chinese Chef, Gingerbread Man (Platinum)
Brace Yourself: Braces, Trooper Brown (Gold)
Starship Whoopers: Chinese, Monkey Assistant, Trooper Black (Gold)
Burns 'n Bangs
Chinese Burns: Calamari, Chef Hat (Platinum)
Snow Business: Snowman, Trooper Grey (Gold)
Rocket Man: Venus Star, Capt. Sand, Duckman Drake (Gold)
Outnumbered, But Never Outpunned!
Someone Has Got To Play...: Capt. Night (Gold)
Time to Split: Barby Gimp, Scourge Splitter (Gold)
Can't Handle This: Chasm, Hatchet Sal, Handyman (Gold)
Team Series B
Hack A Hacker: Krayola, Milkbaby (Gold)
Rice Cracker Rush: Riot Officer, The Master (Gold)
Superfly Lady: Capt. Pain (Gold)
Arcade League (Elite) Bonuses

One Shot Thrills
Babes in the Woods: Jo-Beth Casey (Gold)
Double Bill: Beetleman, The Impersonator (Gold)
Nikki Jinki Bricky: Nikki, Jinki (Gold)

Duel Meaning
If I'm Ugly-You Smell!: Mikey Twoguns, Jared Slim (Platinum)
Golem Guru: Kypriss, Fat Characters (Platinum)
Golden Thighs: High Priest, Aztec Warrior (Platinum)
Frantic Series
Hangar's Hat's Off!: Henchman, Dark Henchman (Gold)
Can't Please Everyone...: Maiden, Changeling (Gold)
Big Top Blowout: Mr. Giggles (Silver), Stumpy (Gold)
Team Series C
Bags Of Fun: Ringmistress, Big Hands, Slow Motion Deaths (Gold)
They're Not Pets!: Baby Drone, Bear (Gold)
Nice Threads: Unknown
Please submit any information regarding the unknown code.
Sincerest Form Of Flattery
Aztec The Dino Hunter: Dinosaur (Gold)
Half Death: Drone Splitter (Gold)
Dead Fraction: Jebediah Crump (Silver)
Challenge Bonuses

Glass Smash
Pane In The Neck: Rotating Heads (Gold)
Bricking It: Brick Weapon (Gold)
Stain Removal: Nothing (Gold)

Behead The Undead
Fight Off The Living Dead: Sewer Zombie (Gold)
Sergio's Last Stand: Sergio (Gold)
Day Of The Dammed: Feeder Zombie (Silver/Gold)
Infiltration
Silent, But Deadly: Viking Hat (Gold)
Trouble At The Docks: Pirate Hat (Gold)
Escape From NeoTokyo: Big Ears hat (Gold)
Banana Chomp
Gone Bananas: Private Coal (Gold)
Monkey Business: Unknown
Playing With Fire: Wood Golem (Silver)
Please submit any information regarding the unknown code.
Cut-Out Shoot-out
Take 'em Down: Ample Sally (Gold)
Fall Out: Marco the Snitch (Gold)
Pick Yer Piece: Sgt. Rock- Gold
Timesplitters "Story" Classic
Badass Buspass Impasse: Badass Cyborg (Gold)
But Where Did The Batteries Go?: R One-Oh-Seven (Platinum)
Hit me Baby One Morgue Time: Cropolite (Gold)
Monkeying Around
Simian Shooter: Insect Mutant (Silver)
Monkey Mayhem: Lola Varuska, Mischief (Platinum)
Dam Bursters: Robofish, Circus level (Gold)
Hidden Mini-Games
When using the Temporal Link, press Triangle while using the link to open a set of mini-games, such as Snake.

Faster Reloads
Some guns have slower reload times than others. Instead of pressing Reload, press Next Weapon quickly followed by Previous Weapon (or vice versa). When you switch to a new weapon and go back to it, the weapon will automatically be reloaded.

Destroying The Bio-Hazard Case
When you restore the power in the building, go down to the "Digging Site". When you get there, you will see a case with something in it. Make sure you have plenty of Timed Mines. Walk towards it and throw four or five Timed Mines at it then run away. When it blows up, the woman on the speaker will start talking. People with very good guns (Flame Thrower, Shotgun, Machine Guns, etc.) will appear. You will also have a new objective to not let any mutants survive.

Kill Zombies Faster
When a zombie comes after you, shoot it in the head.

1990 Oblask Dam Siberia: Anaconda Mini-Game
Once you get across to the other side of the dam and go into the other building with all the shelves, look to something that resembles a Nintendo 64 game cartridge on the first shelf. Walk over and pick it up. It will be in your inventory as "Anaconda". Highlight it and press Action to play the game. Note: This was done under the normal difficulty setting.