Here is the full list of all 40 Fuse achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Complete all missions on Lethal.
Kill 2500 enemies in Campaign and Echelon.
Upgrade Dalton's entire skill tree.
Get Dalton to max level.
Upgrade Jacob's entire skill tree.
Get Jacob to max level.
Upgrade Izzy's entire skill tree.
Get Izzy to max level.
Fully upgrade 16 perks in the Team Perks menu.
Unlock 16 perks.
Spend 100,000 Fuse Credits.
Get 5 Stars on all Echelon maps with 2+ players.
Upgrade Naya's entire skill tree.
Get Naya to max level.
Get 5 Stars on a single Echelon Map with 2+ players.
Complete 12 waves on a single map with 2+ players.
Fully upgrade 1 perk in the Team Perks menu.
Purchase a single Team Perk.
Activate Fusion for the first time.
Pin 3 enemies within a 10 second period.
Crystallize and kill 3 enemies at once.
Eviscerate 3 enemies at once using the MagShield.
Complete Grigori Station.
Complete all missions on normal difficulty.
Complete all missions co-op (2, 3, or 4p).
Collect every piece of Intel in the game.
Save Luther from the Order of Grigori.
Kill 3 Leadfires, Leadfoots, or Leadshots using only your sidearm.
Complete Raven Facility.
Defeat Meilin Mao.
Destroy all of the trucks at the bunker defense.
Defeat Ivan Sovlenko.
Create a chain reaction that takes out 3 enemies at once.
Perform a stealth takedown on the Raven soldier at the urinal.
Complete Hyperion Base.
Complete a single mission in co-op (2, 3 or 4p).
Stealth takedown 4 enemies at once in a four player co-op game.
Perform a stealth takedown on 2 enemies at once in a co-op game.
Retrieve your Xenotech Weapons.
Complete 6 waves on a single map with 2+ players.