Complete the level 5
Complete the first level on easy mode.
Complete the level number 10
Complete the level number 20
Complete the level number 15
Complete the level number 25
Complete the level number 30
Buy the shotgun soldier
Complete the level number 35
Buy the Pistol Soldier
Buy the flamethrower Soldier
Buy the Heavy Soldier
Buy the Sniper Soldier
Buy the Shield Soldier
Buy the SMG Soldier