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