Blood and Screaming
Unlock Orochi Iori and Orochi Leona for use as Strikers.
Bronze
Double Date Night (secret)
"Well, I was thinking we could all get together and enter a bare-knuckle fighting tournament. Or there's always bowling."
Bronze
Independence Day
Unlock the original Team USA for use as Strikers.
Bronze
Irreplaceable
Defeat Zero with Kula.
Bronze
Less Than Zero
Unlock Krizalid for use as a Striker.
Gold
Match Interference
Knock out an opponent with a Striker.
Bronze
Metal Slug 2000 (secret)
Clear Arcade Mode with Ralf, Clark, Leona, and Fio.
Bronze
Multiples of Zero
Clear Arcade mode.
Silver
Reinforcements Have Arrived
Unlock Heidern for use as a Striker.
Bronze
Reunion Tour (secret)
Clear Arcade Mode with Kyo, Shingo, Benimaru, and Daimon.
Bronze
Sibling Rivalry (secret)
Knock out Kula with Another K`.
Bronze
The Men Behind the Men
Unlock Wolfgang Krauser and Mr. Big for use as Strikers.
Bronze
Your Own Personal Apocalypse
Unlock Orochi for use as a Striker.
Silver