Difficulty does NOT affect achievements
1 missable achievements (plus 3 unknown)
Sign in with Steam or Xbox to track your progress, and:
Equip your first gadget onto any agent.
Equip an Upgrade Core to any agent.
Destroy a Drop Pod Launcher Emplacement.
Take over an outpost - this is unmissable during Operation Raging Arrow
Call in an agent vehicle for the first time.
Use Gremlin Tech for the first time.
Find and open a large loot chest.
Jump agent vehicle 50 meters in one jump.
Swap out an agent's weapon with a new look.
"Get 15 "All Perfect" hacks."
You should get this naturally as you play through the story, just be precise with the hacking.
Take over each type of emplacement location.
You need to take over an outpost - after that the Relic Trading Co will appear, as will a Gremlin meetup, get them both too and the achievement will unlock.
Deploy your first agent to any LEGION region.
Run over Legion 10 times.
Destroy a Hate Machine Emplacement.
Destroy a Ice Barrage Emplacement.
Complete LEGION Alert Level by defeating the LEGION Captain.
Destroy a Dark Matter Fracking Station.
Build your first vehicle through blueprints.
Enter a secret room inside a LEGION lair.
Complete a LEGION lair for the first time in Seoul.
Difficult to avoid getting this as you play through the game - some missions require you to complete lairs.
Hit 10 jumps in the city.
Easy enough to get naturally while driving around. This isn't GTA-like where there are special jump points hidden around the place.
Destroy a Gravity Dominator.
Destroy a Golem in the open world.
Unlock 5 Warp Points through open world gameplay.
Sign in to track your progress against these checklist items
Reach level 40 on any agent
Get to level 20 with XP in normal play, then 'overlevel' to 40 by using Upgrade Cores, 1 per level. Near endgame you should have more than enough upgrade cores to do this if you've been exploring and picking up shards wherever possible.
Find a secret room inside a secret room [inside a Lair].
Fully explore every lair and you'll get this sooner or later, they are randomly generated.
Collect all agent vehicles.
Fully upgrade all areas of the ARK.
Complete the Moscow Global Offensive.
Complete 30 MAYHEM & Agent Contracts.
Fully deck out Franchise Force in their signature outfits.
Complete a 360 in the air while in a vehicle.
Fully deck out Carnage a Trois in their signature outfits.
Fully deck out Firing Squad in their signature outfits.
Fully deck out the Bombshells in their signature outfits.
Unlock and Complete all standard VR room training programs.
There are lots of these, you have to complete them all - but they are all quite short. You don't gain XP or anything for characters in here, so pick whatever character you can kill things the fastest with.
Complete all agent personal missions and get all agents to level 20.
Apparently you just need to get any 12 agents to level 20 - so you can mix and match base game and DLC characters for whichever ones you prefer!
Use mission replay to replay and complete 3 missions.
Mission replay becomes available after you complete the story. You may get this if you have to replay missions for the "Hardcore Gamer" achievement.
Complete all Operations on Difficulty Level 7+.
Mission replay is unlocked after completing the story, so you can go back and redo any you did on a lower difficulty.
Agent unlock missions don't count. The original glitch was that if you didn't get this on your first run through of the game, it was impossible to unlock with mission replay. But this is fixed since early Nov 2017.
Collect all collectible Shards in game.
There are 350 shards. A late-game agency upgrade will allow nearby shards to show when you scan the local area - but still it is a mission to get all 350. Note that some are high on buildings.
Complete 15 Connected Contracts.
This will be quite a grind. Every time you play, go in and accept all 3 connected contracts that you can - favouring those that look completeable; i.e. those that are closest to complete or that you can make a big difference to. Try to adjust your activities in game to help contribute to completing the contract. You'll get it eventually...