The player has shocked an enemy in the water

Radio in a naval bombardment that kills at least 4 Japanese soldiers.

Save the soldier before he burns to death.

Collect 100 Light Seeds.

Deflect 20 attacks.

First Healing.

Use the Compass.

Win a wall mini-game in combat.

Unlock Elika's Saving Ability.

Collect 5 pieces of intel in the single player Campaign.

Kill 40 hybrids in the single player Campaign.