On the Danger Zone level, a person can walk through the big "4" into the Danger Zone. Once in the Danger Zone, character that are thrown off the cliff towards the screen will be dealt damage, then respawn and be launched off the cliff again; taking more damage. This will continue until the character is dead.
In Arcade or Play Now mode, you can finish your opponent off with an awesome finishing move. First, g your opponent's health down very low until the two "fists, webs, electric balls, syths, etc." on the touchscreen are blinking. Hit the one that is blinking, then hit the other one (only once). Your character will kill your opponent in a red haze. Note: This trick may not work on some of the characters, but definitely works against Elektra, Dare Devil, Human Torch, and Spider-Man.
Unlock the following characters by performing the corresponding tasks:
CHARACTER - HOW TO UNLOCK Electra - Complete Wolverine's Medium storyline to unlock Electra at the Comic Shop for $6,000. Hazmat - Complete Iron Man's Short Arcade mode to unlock Hazmat at the Comic Shop for $8,000. Iron Man - Complete Wolverine's Long storyline to unlock Iron Man at the Comic Shop for $9,000. non-flaming Human Torch - Complete Human Torch's Medium storyline to unlock his non-flaming costume at the Comic Shop for $5,000. Paragon - Complete Hazmat's long story line to unlock Paragon at the shop. The Thing - In the European version, complete Wolverine's Medium storyline to unlock The Thing at the Comic Shop for $6,000. The Wink - Complete Electra's Short storyline to unlock The Wink at the Comic Shop for $7,000.