This thread covers achievements accomplished on any system from Xbox, PS3, to PC.
Since I'm replaying FF 13 in anticipation of FF 13-2, I'll post the achievements that I'm happiest and most proud of accomplishing for that game =3
Dealt 100,000+damage with a single attack.
Superstar
Earned a 5-star ranking in the battle to determine the world's fate - i.e kicked the final boss's a$$ with style, power, and speed ;3
And I've pretty much gotten almost all the achievements for this game, and am currently working on what is to me the hardest besides Treasure Hunter (hold every weapon and accessory in the game).
I'm working on getting the Master's Seal achievement, which is maxing out all Crystarium roles for all the characters. This was impossible for me to do on my first playthrough as I hadn't known then about the Growth Egg, which doubles your CP amount for every battle you're in. And getting the Growth Egg early is a biatch to do, as you can only receive it by defeating the monster for Mission 55...when your characters are generally only supposed to be able to handle Mission 20-25 monsters XD
I've devoted a ridiculous amount of time to uber training my charrys, and am slowly but surely closing in on maxing out the Crystarium, and finally getting that achievement! =D
I'll post again when I finally do get it ;3