Achievement Name - The Empire Strikes Back
First, you will have to complete the 1st level of Episode 1 (Negotiations). This will then grant you access to all other episodes in the game.
There are 6 chapters in Episode 5:
1) Hoth Battle - Vehicle Level
2) Escape from Echo Base
3) Falcon Flight - Vehicle Level
5) Cloud City Trap
6) Betrayal Over Bespin
A 100% video guide can be found here:https://youtube.com/playlist?list=PLs9rvQZdz2r65Tz_wPJUwbV7W...
(Credit to HappyThumbsGaming)