Here is the full list of all 26 Mercenary Kings achievements.
Clear all missions of the game.
Defeat the final boss.
Complete a mission with all parts of the SWAT-12 shotgun equipped.
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Clear all missions of any rank consecutively using the same gun parts.
Defeat the Steel Soldier using only your knife.
Defeat over 10000 enemies.
Rescue all 6 Kickstarter backer hostages.
Defeat Commander Byron Baron once.
Hunt over 250 animals.
Collect over 2000 materials.
Defeat a boss before it can escape.
Defeat over 1000 enemies.
Complete a mission in single player without getting hit.
Complete No Negotiation without saving any hostages.
Unlock all Proficiencies.
Revive a teammate 10 times with the Adrenaline Shot.
Earn over $1,000,000.
Craft over 100 knives and 300 gun parts.
Activate all 14 food skills.
Clear all Major rank missions without using Rations nor First-Aid kits.
Clear all 10 Primary missions of the game with the Bolt 45.
Beat the fastest time of all missions of the game.
Craft all Bionic Mods.
Craft 20 Ornaments and 20 Banners.
Reach the Five-Star General rank.