Overview
- Estimated achievement difficulty: 4/10
- Offline: 36/41 (880)
- Online: 5/41 (120)
- Approximate amount of time to 1000: 14-16 hours
- Minimum number of playthroughs needed: 1 (2 is Recomended)
- Number of missable achievements: None (Chapter Select)
- Do cheat codes disable achievements?: None
- Does difficulty affect achievements?: Yes
- Glitchy achievements: None
- Unobtainable achievements: None
- Extra equipment needed?: None
Step One - Cadet Playthrough
I would suggest doing your first playthrough on Cadet difficulty just to get the hang of things. It's a good opportunity to get to know the bullet drop over different distances and makes it a hell of a lot easier to get the collectibles and miscellaneous achievements. It doesn't matter if you miss collectibles and achievements on your first run as chapter select allows you to go back and clean up. Use this playthrough to enjoy and get a feel for the game.
Step Two - Collectibles/Miscellaneous Achievements
Now that you have finished your first playthrough and have a feel for the game, go back and get any achievements and/or collectibles you may have missed. Since you started the game on easy it shouldn't take long with easy enemies and chapter select. You can check your overall stats in the 'Extras Menu', that way you know how far you have to go to unlock an achievement.
Step Three - Sniper Elite Playthrough
Now that you have all the story based, collectible, and miscellaneous achievements out of the way, it's time to do a playthrough on Sniper Elite difficulty. You could have skiped the easy playthrough and gone straight for this but it might have made things more difficult for you depending on your skill. You will notice a difference on this difficulty, as you now will not be able to take as many hits before dying and the enemy AI is more accurate.
Step Four - Online Co-op
Online achievements aren't very hard just take a little time. You can get one of your buddies to help you with this or find someone to help you in the Achievement Trading/Co-Op Thread.
[x360a would like to thank judd90 for this roadmap]