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.
Fully upgrade all areas of the ARK.
Complete "Operation: Red Queen."
Complete "Operation: Machine Man."
Complete the Moscow Global Offensive.
Reach level 40 on any agent
Complete a LEGION lair for the first time in Seoul.
Complete LEGION Alert Level by defeating the LEGION Captain.
Complete "Operation: Star Power."
Unlock 5 Warp Points through open world gameplay.
Destroy a Golem in the open world.
Enter a secret room inside a LEGION lair.
Destroy a Dark Matter Fracking Station.
Build your first vehicle through blueprints.
Run over Legion 10 times.
Use Gremlin Tech for the first time.
Hit 10 jumps in the city.
Complete "Operation: Heaven Sent."
Find and open a large loot chest.
Destroy a Ice Barrage Emplacement.
Take over each type of emplacement location.
Destroy a Hate Machine Emplacement.
Get 15 "All Perfect" hacks.
Deploy your first agent to any LEGION region.
Swap out an agent's weapon with a new look.
Jump agent vehicle 50 meters in one jump.
Call in an agent vehicle for the first time.
Equip an Upgrade Core to any agent.
Take over an Outpost from LEGION.
Destroy a Drop Pod Launcher Emplacement.
Equip your first gadget onto any agent.
Warp into the ARK for the first time.
Complete "Operation: Spinoff."
Complete "Operation: Madhouse."
Complete "Operation: Damocles."
Use mission replay to replay and complete 3 missions.
Destroy a Gravity Dominator.
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.
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.
Collect all collectible Shards in game.
Collect all agent vehicles.
Complete all Operations on Difficulty Level 7+.
Complete all agent personal missions and get all agents to level 20.