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