Beat the 1935 Tomb level in story mode on the easy difficulty setting to unlock Cultist as a playable character in arcade mode. Finish the level in under 1 minute to also unlock the Paintball mode cheat. Finish the level on the normal difficulty setting to unlock the Graveyard level in arcade mode. Finish the level on the hard difficulty setting to unlock Eyes Mummy as a playable character in arcade mode.

1970 Chinese story level reward

Beat the 1970 Chinese level in story mode on the easy difficulty setting to unlock Chinese Chef as a playable character in arcade mode. Finish the level on the normal difficulty setting to unlock the Site level in arcade mode. Finish the level on the hard difficulty setting to unlock Suit Hoodlum as a playable character in arcade mode.

2005 Cyberden story level reward

Beat the 2005 Cyberden level in story mode on the easy difficulty setting to unlock the 1950 Village, 1985 Chemical Plant, and 2020 Planet X levels in story mode; Dr Seth Graven. Dr Kate Nadir, Fingers McKenzie, Ravelle Velvet, Sebastian Photon, Angel Perez, and Badass Cyborg as playable characters in arcade mode; and Badass Cyborg, Siamese Cyborg, and Female Cyborg as Bots in arcade mode. Finish the level on the normal difficulty setting to unlock the Streets level in arcade mode.

1950 Village story level reward

Beat the 1950 Village level in story mode on the easy difficulty setting to unlock the 1950 Village level in arcade mode; and "Period Horror" as a Bot Set in arcade mode. Finish the level on the normal difficulty setting to unlock the Castle level in arcade mode.

1985 Chemical story Plant level reward

Beat the 1985 Chemical Plant level in story mode on the easy difficulty setting to unlock the 1985 Chemical Plant level in arcade mode; "Usual Suspects" as a Bot Set in arcade mode; and Lumberjack, Malehood, and Waiter as Bots in arcade mode. Finish the level on the normal difficulty setting to unlock the Bank level in arcade mode.

2020 Planet X story level reward

Beat the 2020 Planet X level in story mode on the easy difficulty setting to unlock the 1965 Mansion, 2000 Docks, and 2035 Spaceways levels in story mode; 2020 Planet X level in arcade mode; Peekabo Jones, Mary-Beth Casey, Jacques Misere, Olga Strom, R108, and Gretel as playable characters in arcade mode; "Space Opera" as a Bot Set in arcade mode; and Tuxedo Cyborg, Red Alien, and Green Alien as Bots in arcade mode. Finish the level on the normal difficulty setting to unlock the Spaceship level in arcade mode.

1965 Mansion story level reward

Beat the 1965 Mansion level in story mode on the easy difficulty setting to unlock the 1965 Mansion level in arcade mode; "Horror Shocker" as a Bot Set in arcade mode; and Fishwife Mutant, Hick Hyde, Insect Mutant, Overall Mutant, Police Zombie, Girl Zombie, Skull Zombie, and Jacket Zombie as Bots in arcade mode. Note: Set "Auto Aim" to toggle, leave it on, and crouch to get easier head shots to complete this level easier. Finish the level on the normal difficulty setting to unlock the Mall level in arcade mode.

2000 Docks story level reward

Beat the 2000 Docks level in story mode on the easy difficulty setting to unlock the 2000 Docks level in arcade mode; "Law and Order" as a Bot Set in arcade mode; and Male Soldier, Female Soldier, Gasmask Soldier, Male SWAT, Female SWAT, and Gasmask SWAT as Bots in arcade mode. Note: There are a lot of snipers in high perches by the waterfront, so be alert in this level. Finish the level on the normal difficulty setting to unlock the Compound level in arcade mode.

2035 Spaceways story level reward

Beat the 2035 Spaceways level in story mode on the easy difficulty setting to unlock the 2035 Spaceways level and "Space Opera" as a Bot Set in arcade mode. Finish the level on the normal difficulty setting to unlock the Warzone level in arcade mode.

Challenge mode

Beat story mode to unlock challenge mode, which allows you to compete in different challenging situations.

Challenge 1-A Behead the Undead level reward

Beat all challenges to unlock "The Living Dead" as a Bot Set in arcade mode and the Challenge 1-B Putrid Punchout level.

Challenge 1-B Putrid Punchout level reward

Beat all challenges to unlock Green Zombie and Brown Zombie as playable characters in arcade mode and the Challenge 1-C Dusk Of The Dead level.

Challenge 1-C Dusk Of The Dead level reward

Beat all challenges to unlock Police Zombie, Skull Zombie, and Jacket Zombie as playable characters in arcade mode and the Challenge 2-A Flock Around The Dock level.

Challenge 2-A Flock Around The Dock level reward

Beat all challenges to unlock Duckman Drake as a Bot in arcade mode and the Challenge 2-B Pro Am Duck Shoot level.

Challenge 2-B Pro Am Duck Shoot level reward

Beat all challenges to unlock the "All Enemies Are Ducks" cheat and the Challenge 2-C Crispy Duck level.

Challenge 2-C Crispy Duck level reward

Beat all challenges to unlock Duckman Drake as a playable character in arcade mode and the Challenge 3-A Tin Man level.

Challenge 3-A Tin Man level reward

Beat all challenges to unlock Robofish as Bot in arcade mode and the Challenge 3-B Lobster Run level.

Challenge 3-B Lobster Run level reward

Beat all challenges to unlock the "All Enemies Are Robofish" cheat and the Challenge 3-C Bowl Them Over level.

Challenge 3-C Bowl Them Over level reward

Beat all challenges to unlock Robofish as a playable character in arcade mode and the Challenge 4-A Shame If Something Got Broken level.

Challenge 4-A Shame If Something Got Broken level reward

Beat all challenges to unlock the Challenge 4-B Don't Wait Around level.

Challenge 4-B Don't Wait Around level reward

Beat all challenges to unlock the "Enemy Bricks" cheat and the Challenge 4-C Brick Flung High level.

Challenge 4-C Brick Flung High level reward

Beat all challenges to unlock the brick as a weapon in arcade mode and the Challenge 5-A First Impressions level.

Challenge 5-A First Impressions level reward

Beat all challenges to unlock The Impersonator as Bot in arcade mode and the Challenge 5-B Lasting Impressions level.

Challenge 5-B Lasting Impressions level reward

Beat all challenges to unlock the "All Enemies Are Impersonators" cheat and the Challenge 5-C Who's he Trying to Impress? level.

Challenge 5-C Who's he Trying to Impress? level reward

Beat all challenges to unlock The Impersonator as a playable character in arcade mode and the Challenge 6-A Barrel Blast level.

Challenge 6-A Barrel Blast level reward

Beat all challenges to unlock the Challenge 6-B Bodyguard level.

Challenge 6-B Bodyguard level reward

Beat all challenges to unlock Gasmask SWAT as playable character in arcade mode and the Challenge 6-C Heist level.

Challenge 6-C Heist level reward

Beat all challenges to unlock Veiled SWAT as a Bot and playable character in arcade mode and the Challenge 7-A Shop 'Til You Drop level.

Challenge 7-A Shop 'Til You Drop level reward

Beat all challenges to unlock Ginger as a Bot in arcade mode and the Challenge 7-B Sorry, Was That Your Bag? level.

Challenge 7-B Sorry, Was That Your Bag? level reward

Beat all challenges to unlock "All Enemies Are Gingerbreads" cheat and the Challenge 7-C Everyone Must Go! level.

Challenge 7-C Everyone Must Go! level reward

Beat all challenges to unlock Gingerbead as a playable character in arcade mode and the Challenge 8-A Girls 'n' Boys level.

Challenge 8-A Girls 'n' Boys level reward

Beat all challenges to unlock Fun-Bunny as a Bot in arcade mode and the Challenge 8-B Dinner Dates level.

Challenge 8-B Dinner Dates level reward

Beat all challenges to unlock the "All Enemies Are Bunnies" cheat and the Challenge 8-C Bone Grab level.

Challenge 8-C Bone Grab level reward

Beat all challenges to unlock Farrah Fun-Bunny as a playable character in arcade mode and the Challenge 9-A I Can't Hear Anyone Screaming level.

Challenge 9-A I Can't Hear Anyone Screaming level reward

Beat all challenges to unlock TimeSplitters as a Bot Set in arcade mode; TimeSplitter, and TimeSplitter (Same name, different character) as bots in arcade mode; and the Challenge 9-B Flight Delay level.

Challenge 9-B Flight Delay level reward

Beat all challenges to unlock TimeSplitter as a playable character in arcade mode.

Frozen Bots

While you are in Arcade mode, set your weapons to custom, but don't set any options. When you enter a match, your guns will not shoot.

All weapons

Pause the game, then hold L1 + L2 + R1 + R2 and press X(2), Triangle(2).

View Credits option

Beat story mode on the easy difficulty setting to unlock a "View Credits" option on the main character selection screen.