Like items, special abilities in Battlefield Heroes can be unlocked as your hero gains more experience.

“Wall Hack” or “6th Sense”

Allows you to see outlines of other players behind walls.

Health Boost

Allows you to “heal” your health by a small amount.

Damage Bonus

Allows you to dish out additional damage.

I Eat Grenades

Throw 7 grenades at once.

“Bomb Bouquet”

Throw 15 grenades at once.

Blasting Strike

It seems to make everything in close parameter jump 10-feet into the air.

Frenzy Fire

Adds fire to your bullets.

Group Heal

Heals everybody around you. May be exclusive to the soldier class.