Finish Mission 1 (Normal difficulty).

Finish Mission 2 (Normal difficulty).

Finish Mission 3 (Normal difficulty).

Finish Mission 4 (Normal difficulty).

Finish Mission 5 (Normal difficulty).

Beat the game (one session)

Achieve 220 points on Combat School.

Achieve 660 points on Combat School.

Achieve 1000 points on Combat School.

Finish Survival Attack.

Finish Survival Attack using only the Super Devil handgun (P1).

Collect 10 POWs on Mission 1 (Arcade Mission).

Collect 12 POWs on Mission 2 (Arcade Mission).

Collect 12 POWs on Mission 3 (Arcade Mission).

Collect 23 POWs on Mission 4 (Arcade Mission).

Collect 15 POWs on Mission 5 (Arcade Mission).

Collect 25 POWs on Mission 6 (Arcade Mission).

Get an "Great!" message on the mission results screen.

Finish Mission 1 with a Metal Slug in Arcade Mission (Normal difficulty).

Finish Mission 2 with a Metal Slug in Arcade Mission (Normal difficulty).

Finish Mission 3 with a Metal Slug in Arcade Mission (Normal difficulty).

Finish Mission 4 with a Metal Slug in Arcade Mission (Normal difficulty).

Finish Mission 5 with a Metal Slug in Arcade Mission (Normal difficulty).

Finish Mission 6 with a Metal Slug in Arcade Mission (Normal difficulty).

Beat the game without using a continue on Normal difficulty (Hero 3).

Beat the game within 18 minutes on Hard difficulty.

Finish Mission 1 without throwing grenades and no deaths in Arcade Mission (Normal difficulty).

Finish Mission 2 without throwing grenades and no deaths in Arcade Mission (Normal difficulty).

Finish Mission 3 without throwing grenades and no deaths in Arcade Mission (Normal difficulty).

Finish Mission 4 without throwing grenades and no deaths in Arcade Mission (Normal difficulty).

Finish Mission 5 without throwing grenades and no deaths in Arcade Mission (Normal difficulty).

Finish Final Mission without throwing grenades and no deaths in Arcade Mission (Normal difficulty).

Finish Another Story #1 for the first time.

Finish Another Story #2.