To obtain True Survivor you have to fill the gold LEGO Stud meter. You do this by collecting LEGO Studs. Silver studs are worth 10, Gold studs are worth 100, Blue studs are worth 1000, and Purple studs are worth 5000. Each level has a different target Score that you have to reach to get True Survivor.
To make it easer you can use the cheat code 5MZ73E to unlock Score x2 .
The trophy unlocks once the level is complete.