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