+Estimated achievement difficulty: 4/10
+Offline: 31 (1000)
+Approximate amount of time to 1000: 50-60 Hours
+Minimum number of playthroughs needed: 1
+Number of missable achievements: None
+Do cheat codes disable achievements? None
+Does difficulty affect achievements? Yes (Fair Fighter)
+Glitchy achievements? None
+Unobtainable achievements? None
+Extra equipment needed? No
Welcome to Final Fantasy XIII-2! Personally I thought this game was much better than the first. It kept the good parts and fixed most of the bad. Others may disagree, but that's not really the point here anyway! The achievement list is waaaaay easier than the first game. It won't take you nearly half as long, with much less repetition and aggravation. Fun game + straightforward achievements = win!
Step 1: Complete the Game (+Paradox Ending #1)
Because this game has no missable achievements, and a complete "Time Reversal" function of every area, I'd suggest just enjoying the game on your first go of it. Don't hassle with the fragment collection, 5-starring any bosses or anything like that. If you want to knock out Clock Stopper or some other achievements early in the game, that isn't going to harm anything, but otherwise just play through the game and then worry about everything else.
The only thing you want to worry about is possibly doing Paradox Ending #1, which does not require you to already have beaten the game (unlike the rest) - see "Anomalous" for more info on that.
Step 2: Defragmented Achievement
Now you'll want to collect all 160 Fragments. A guide for all of those can be found here.
Step 3: Anomalous Achievement
Now that you can access every ending in the game, follow the steps for each of the game's endings in the "Anomalous" achievement below.
Step 4: Clean Up
You likely don't have anything left at this point, but if for some reason you never got things like Sependipitious or Giant's Fist, grab them now to finish your 1000G!
[x360a would like to thank The Pants Party for this Roadmap]