Peak Strength Achievement
Reach level 100. Dahna's liberators now stand tall and mighty having come from rock bottom.You will probably only get to Level 45-60 from completing the story depending on what difficulty you played on and how much side content you did. For the remainder of the levels, work on doing all the subquests and finding collectibles, then you can repeat the boss in Subquest #44 as many times as you'd like in a row simply by talking to him, and will gain at least 1-3 levels each time. Be sure to enable the artifact from Subquest #43 which gives an 80% boost to XP gains. Alternatively, you can purchase up to 40 Levels from the Xbox Store (two +10 packs and four separate +5 packs), but again I'd advise against wasting your money on that since you can max out your level in just an hour or two with the Chronos method.