Defeat a Heavy Soldier using only the stun baton

Retrieve the Demon Core

Destroy a helicopter

Get off the train in 10 minutes or less

Get a strike in the Chicago Mall bowling lanes

Get a prize from the claw machine

Beat the Turbo Killer arcade game

Get 1000 points in the Super Racer 4 arcade game

Get the basketball in the hoop

Hit dartboard right in the center 3 times in a row

Consume the whole ammo capacity of a heavy weapon

Picked up all weapons

Complete the game

Complete the game on Easy or higher

Complete the game on Normal or higher

Complete the game on Hard

Begin a game on the hardest difficulty

Defeat the Los Alamos Defender

Defeat the Psychic Giant

Defeat the Colonel

Defuse the Demon Core Bomb

Defeat the Mech

Kill a Grunt with a Barbell