Assigned by Reward Required Location Preceded by Followed by Open the Precursor door Requirements Trophy type Open the Precursor door was a mission that Jak and Daxter completed to obtain a power cell in The Precursor Legacy. A continuation of the training course, introducing Jak to blue eco and the effect it has on some Precursor artifacts. The PlayStation 3 and Vita versions of this mission are related to a trophy named "Open Sez Me", completing this mission will reward you with a bronze trophy.