Special Combos:
The Code Breaker: Found on Weapon's Training Stage, to unlock, Find the breifcase among the Operators secret stash in a dark upstairs room.
Quick Kicks:
Found on "Storming the Drain" Stage, to unlock, in the 2nd to last room, use the ledges along the wall to reach both of the top two platforms.
Machine Gun Kick:
Found on "The Chase: I need an Exit Stage" to unlock, Find the breifcase in the corner of the market area behind the fruit stands
Ultimate Hyper Strike:
Found on "Redpill Rescue: Security Gaurd" Stage, to unlock, Defeat the 5 members of SWAT by the stairs in 30 seconds, use frag grenade)
The Beginning of the End:
Found on "Seraph's Apology" Stage, to unlock, once you return to the teahouse from the theatre, destroy all 8 colums and a table to get a breifcase
The One:
Found on "The Burly Brawl" Stage, to unlock, Defeat 30 Smith's before the level ends to make a breifcase appear in the center of the level, claim it