Here is the full list of all 49 Agents of Mayhem achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Destroy a Golem in the open world.
Enter a secret room inside a LEGION lair.
Destroy a Ice Barrage Emplacement.
Jump agent vehicle 50 meters in one jump.
Destroy a Gravity Dominator.
Destroy a Dark Matter Fracking Station.
Complete "Operation: Heaven Sent."
Get 15 "All Perfect" hacks.
Destroy a Hate Machine Emplacement.
Deploy your first agent to any LEGION region.
Swap out an agent's weapon with a new look.
Use Gremlin Tech for the first time.
Call in an agent vehicle for the first time.
Take over each type of emplacement location.
Equip an Upgrade Core to any agent.
Complete a LEGION lair for the first time in Seoul.
Take over an Outpost from LEGION.
Destroy a Drop Pod Launcher Emplacement.
Warp into the ARK for the first time.
Find and open a large loot chest.
Complete "Operation: Spinoff."
Equip your first gadget onto any agent.
Complete "Operation: Star Power."
Complete "Operation: Machine Man."
Complete "Operation: Red Queen."
Complete "Operation: Madhouse."
Complete "Operation: Damocles."
Use mission replay to replay and complete 3 missions.
Complete LEGION Alert Level by defeating the LEGION Captain.
Unlock 5 Warp Points through open world gameplay.
Enter a secret room, inside a secret room, inside a LEGION lair.
Fully deck out Carnage a Trois in their signature outfits.
Fully deck out Franchise Force in their signature outfits.
Fully deck out the Bombshells in their signature outfits.
Fully deck out Firing Squad in their signature outfits.
Build your first vehicle through blueprints.
Run over Legion 10 times.
Complete a 360 in the air while in a vehicle.
Complete 15 Connected Contracts.
Complete 30 MAYHEM & Agent Contracts.
Unlock and Complete all standard VR room training programs.
Hit 10 jumps in the city.
Collect all collectible Shards in game.
Fully upgrade all areas of the ARK.
Collect all agent vehicles.
Complete all Operations on Difficulty Level 7+.
Complete the Moscow Global Offensive.
Reach level 40 on any agent
Complete all agent personal missions and get all agents to level 20.