Here is the full list of all 34 I am weapon: Revival achievements.
Complete the game
Complete the game in co-op mode
Walk through the Eternal Ice
Use 100 hearts
Use all active abilities
Find all prototypes
Solve the shadow puzzle
Open all safes
Max out an ability "Get max hearts"
Cross the Swamp of Illusions
Complete Pirate's quest
Buy best armor
Cross the Desert of Lost Time
Complete Chief's quest
Spend 900 000 souls
Find all prototypes on six levels
Walk through the Isles of Memories
Help the Madman and Criminal
Use every long-range weapon
Complete a side quest
Collect 300000 souls
Start the game in co-op mode
Meet the Firefly
Collect 100 adrenaline mixes
Complete the game at Nightmare difficulty
Kill 200 burning enemies with a sword
Kill 25 enemies in 2 seconds
Kill 2000 enemies by means of other enemies
Kill 200 frozen enemies with an axe
Kill 10000 enemies with a long-range weapon
Kill 3000 enemies with a chainsaw
Kill 10000 enemies with a melee weapon
Join three players in co-op mode
Complete all the side quests