Estimated achievement difficulty: 8/10
Offline: 35 (750)
Online: 5 (250)
Estimated amount of time to 1000: 25 – 30 hours
Minimum number of playthroughs needed: 1 – 2
Number of missable achievements: 1 (explained in Introduction)
Glitched achievements: Read the introduction for more info
Do cheat codes disable achievements?: Yes. (Read Introduction for more info)
The reason that there is 1 – 2 playthroughs is because if you rented the game or you just want to rush the achievements, you can get them all in one playthrough. But I recommend that you go through it first to grasp all concepts of the game because you will need them to get all the achievements.
Introduction:
Thank you for purchasing (or renting) Mercenaries 2: World in Flames! This game contains a total of 40 achievements branching off into 35 offline achievements and 5 online achievements where you have to play co-op with a friend. Most of the achievements consist of destroying things, earning money, completing challenges, and achieving maximum mood with the different factions. While 11 other achievements you get for going through the storyline.
A lot of the achievements in this game are glitched. All known glitched achievements are described in this thread. Also, there is only 1 missable achievement (Read “Missable Achievement”)
Whenever a cheat code is enabled in a save file, achievements are disabled forever on that save file. You might not want to activate cheats unless you really need them (and you don’t want the achievements…).
Missable Achievement
There is only 1 missable achievement in the beginning of the game. At one point, a tank busts through a wall. If you destroy the tank, then you will get nothing, but if you hijack it, then you will get an achievement worth 50.
Destroying Objects
4 achievements in Mercenaries 2 consist of destroying 50 objects with a certain weapon. 3 of them are destroying objects with an RPG, grenades, and melee. The last one is sniping 50 enemy vehicle drivers. None of these are hard except for sniping. The last thing is that people count as objects, so you can kill enemies to get the achievements.
Capturing HVTs
2 of the achievements are verifying all high value targets (“…And Justice for All”) and capturing all 55 alive (“Aces High”). I recommend trying to get Aces High on your second playthrough because you will need to grasp all concepts of the game to keep them all alive.
Unlocking all Shop Items
One of the hardest achievements in this game would be collecting all shop items (“Digital Man”). To get this achievement you must collect all 100 custom parts (which are scattered across Venezuela), complete all challenges, destroy all designated buildings, verify all HVT’s, destroy 40 billboards, kill 50 of every faction, and complete the story.
Co-op Achievements
The last set of 5 achievements are for playing with a friend in Co-op. All 5 Co-op achievements are worth 50. The Co-op achievements for this game are: Playing with a friend, destroying 200 objects in the gunner seat, using 20 airstrikes, and coming in first in a Co-op race. The last achievement in Co-op is playing with a Mercenaries 2 developer or someone who already has this achievement.
Conclusion
There are many achievements that have not been explained in this Road Map, but the most difficult achievements have been outlined. The last thing is that it is not very hard to 100% this game, but there will be times where you will get very frustrated.