ACHIEVEMENT - HOW TO UNLOCK Airport - Finish the map Airport. Amorer - Upgrade the assault rifle to the max in the campaign. Arsenal - Purchase all weapons in the campaign. Award Winner - Bonus multiplier reached 10. Depot - Finish the map Depot. Don't get hurt! - Bonus multiplier reached 50. Easy - Finish the campaign in Easy. Elite Killer - Bonus multiplier reached 100. Expert - Kill 5000 mutants. Factory - Finish the map Factory. Grenadier - Purchase all grenade types in the campaign. Harbor - Finish the map Harbor. Hard - Finish the campaign in Hard. Highway - Finish the map Highway. Immortal - Finish one mission in difficulty hard without being killed. Insane! - Finish the campaign in Insane. Junk Yard - Finish the map Junk Yard. Military Base - Finish the map Military Base. Normal - Finish the campaign in Normal. Rip - Died 10x. Rookie - Kill 10 mutants. Self-made Millionaire - Pickup 21 money packs. Skilled - Kill 1000 mutants. Specialist - Kill 10000 mutants. Speedrun - Finish a mission in less than 12 minutes. Stay lying down - Died 50x. Town - Finish the map Town. Village - Finish the map Village.