This achievement is story related and can't technically be missed unless you played the game on a lower difficulty (easy or medium/normal) than hard, or simply didn't finish the game.
The Force Unleashed 2 is around 8hrs long, and could be done in one sitting if you don't mind the rather challenging boss fights. Hard mode up scales damage to you and health of enemies/decreases your damage output (standard hard mode stuff.) If you're not very good at chaining combos or button mashing, do a play-through on normal or easy to get a feel of the game first.
The worst, and in my personal opinion hardest, part of the game is its ending sequence. Like with the first Force Unleashed game
its honestly the only hard part of the sequel.
Like always, I love and trust IGN's guides. They've been a lifesaver for as long as I can remember. https://www.ign.com/wikis/star-wars-the-force-unleashed-ii