-Estimated achievement difficulty: 7/10
-Offline: 39 (1000)
-Online: 0
-Approximate amount of time to 1000: 10-15 hours
-Minimum number of playthroughs needed: 2 (Two difficulty modes)
-Number of missable achievements: None!
-Glitched achievements: None!
-Do cheat codes disable achievements?: No Cheats
-Does difficulty affect achievements?: Yes
Introduction:
Definitely the most difficult part of this game is the hardest difficulty. The majority of the achievements can be attained in one playthrough of the story, with the remainder only being accessible once beating the game and unlocking the other game mode and costumes. It is recommended that you play on Easy once, and then a second time on Formidable to get the last few points.
Step 1: Easy Mode
Playing through the game on Easy mode will help you get acquainted with the levels and the controls, which will help a great deal in the future. Each mission (of which there are 13) has a Primary Objective and a Hero Objective. You only need to pay attention to the primary objective to progress the story, but getting the Hero Objective in each mission will unlock the Excelsior! achievement as well. At the end of this playthrough you will have unlocked a minimum of 15 Achievements worth 370.
Step 2: One Man Army
Play through all the One Man Army missions that were unlocked during the single player game. They are all incredibly easy and shouldn’t take more than 20 minutes per level, and that’s if you’re not good at this game. There are five in total, each versus a different group of enemies on a different map from the single player story mode. Each one will also unlock a new set of armor for Iron Man, as well as giving you another five achievements worth 125, bringing you up to at least 495.
Step 3: Suit up!
From here, all that’s left are Suit-specific Achievements (Hulk Smash!, etc.), those relating to non-mission-specific scenarios (Pugilist, Impenetrable, Your Own Medicine,etc), and non-Objective-related achievements in the various missions. You can complete many of these in any of the later missions, and indeed you should have already got some of them unintentionally. The only ones that might provide a problem are “Air Superiority” and possibly “An Object in Motion” You’ll get 17 Achievements and 255 leaving you with a total of 37 achievements and 850.
Step 4: Formidable Difficulty
If you did play on Easy, then you’ll need to play through once more on Formidable to get the last two Achievements, which should be Hero and Superhero. At the end you’ll have all 1000. If you need to, you can play once on Normal mode just for Hero and then a third time on Formidable to finish this game off.
Conclusion:
This game is – theoretically – an easy 1000; you just have to be good enough to get through the Formidable difficulty. At the very least, it’s an easy 850, which isn’t bad for a movie tie-in. There are plenty of Formidable guides on the web, just find one that works for you and have at her!