Secret Unlockables

Enter these codes at the specified area to get the listed effect. Note: Press + after entering the codes.
Code ................................... Effect
Up, Up, Down, Down, Left, Left, Left, +  Enter at Hero Management Menu - All Character Code
Up, Down, Up, Down, Left, Right, Left, Right, Up, Down, + Enter at Hero Management Menu - Unlock all costumes
Left, Right, Left, Right, Up, Down, Up, Down, Left, Right, + Enter at Hero Management Menu - Unlock all powers
Up, Up, Up, Left, Right, Left, + ....... Enter at Team Menu - 100,000 Shield Credits
Up, Left, Up, Right, Down, Right, + .... Enter while in-game - Super Speed

Unlockables
Hard Mode

Beat the game on Normal Mode.

Team Bonuses

Certain character combinations unlock special boosts.
Unlockable ............................. How to Unlock
Agents of SHIELD ....................... Captain America, Nick Fury, Spider-Woman, Wolverine
Agile Warriors : 10% Reduced Energy Cost Spider-Man, Spider-Woman, Elektra, Deadpool
Air Force .............................. Human Torch, Ms. Marvel, Storm, Thor
Alternate Identities ................... Ironman - War Machine, Ghost Rider – Western, Spider-Woman - Secret Wars, Ms. Marvel – Ventura, Thor - Beta Ray Bill
Assassins .............................. Blade, Deadpool, Elektra, Wolverine
Avengers : +5% damage .................. Captain America, Thor, Iron Man, Spider-Woman, Ms. Marvel
Bad to the Bone ........................ Blade, Ghost Rider, Luke Cage, Wolverine
Bruisers : +15 Striking ................ Thing, Captain America, Luke Cage, Ms. Marvel
Classic Avengers ....................... Black Panther, Captain America, Iron Man, Thor
Dark Past .............................. Blade, Elektra, Ghost Rider, Spider-Woman
Defenders .............................. Dr. Strange, Iceman, Luke Cage, Silver Surfer
Double Date ............................ Black Panther, Invisible Woman, Mr. Fantastic, Storm
Fantastic Four : 20 Health per KO ...... Mr. Fantastic, Invisible Women, Human Torch, Thing
Femme Fatale : +5% Damage .............. Ms. Marvel, Storm, Invisible Woman, Elektra, Spider-Woman
Flashback .............................. Iceman in Snowy Form, Captain America in WW2, Daredevil in Original, Ghost Rider in Original, Iron Man in Classic, Orig. Ms. Marvel, Classic Wolverin
Martial Artists ........................ Black Panther, Captain America, Daredevil, Moon Knight, Nick Fury
Marvel Knights ......................... Black Panther, Daredevil, Dr. Strange, Luke Cage, Spider-Man, Moon Knight
Marvel Royalty ......................... Black Panther, Dr. Strange, Thor, Storm
Natural Forces : 5% Dmg inflicted as Health Gain Thor, Strom, Human Torch, Ice Man
Natural Leaders ........................ Captain America, Dr. Strange, Mr. Fantastic, Nick Fury, Storm
New Avengers : +5% All Resistances ..... Captain America, Luke Cage, Wolverine, Spider-Man, Spider-Woman
New Fantastic Four ..................... Ghost Rider, Luke Cage, Spider-Man, Wolverine
Power Platoon : 20 Energy per KO ....... Silver Surfer, Iron Man, Ms. Marvel, Thor
Raven Ultimates: +6 body,strike, and focus Deadpool, Colossus, Moon Knight, Thing
Scorchers .............................. Ghost Rider, Human Torch, Storm, Thor
Supernaturals .......................... Blade, Dr. Strange, Ghost Rider, Thor
Think Tanks: +15% Max Health ........... Dr. Strange, Mr. Fantastic, Spider-Man, Iron Man
Weapons Specialists .................... Blade, Captain America, Deadpool, Elektra, Nick Fury
X-Men .................................. Colossus, Iceman, Storm, Wolverine

Unlockable Heros and Modes

There are a total of 7 playable characters which can be unlocked after performing certain ingame criteria.
Unlockable ............................. How to Unlock
Black Panther .......................... Collect Black Panther Action Figures throughout various acts
Blade .................................. Play Crane Game in Murder World
Daredevil .............................. Collect Daredevil Action Figures throughout various acts
Dr. Strange ............................ Rescue him from Mandrin in Act 1
Ghostrider ............................. Rescue him from Mephisto in Act 2
Hard Mode .............................. Complete the game on normal mode
Nick Fury .............................. Complete the game on easy or normal mode
Silver Surfer .......................... Complete all Comic Book Missions