Destroy a Ghast with a fireball.

Establish a beachhead at Peleliu Island on any difficulty. (Solo only)

Shoot all of Amsel's henchmen, including their attack dog, without reloading. (Solo only)

Burn an enemy out of a tree with the flamethrower in 'Hard Landing'.

Complete 'Semper Fi' on any difficulty. (Solo only)

Attack and destroy a monster.

Smelt an iron ingot.

Construct a better pickaxe.

Use planks and sticks to make a hoe.

Use planks and sticks to make a sword.

Punch a tree until the block of wood pops out.

Take a longer walk.

Bathe in violence.