Install a modification of each category on a single weapon.

Found Anton Sokolov in the Clockwork Mansion

Name the locomotive.

Completed the mission "My First Gun"

Complete The Showstopper.

Paralyze a licker's sense of hearing.

Defeat an enemy with a knife.

Select a Starting Location and use an Agency Pickup to smuggle an item into Hokkaido.

Complete Claire's story.

Expand inventory slots to max.

Shoot Tyrant's hat off his head.

Shoot the grenade you fed to an enemy.