Checklist:
Complete all story levels.
Earn true survivor on every level.
Unlock/buy all characters.
Unlock/buy all vehicles.
Cure all sick dinosaurs.
Collect 275 gold bricks.
Collect 20 amber bricks.
Collect 20 red bricks.
Collect 20 photographs.
Complete 20 races.
Collect all 200 minikits.
Rescue all 20 workers in peril.
If you're like me, and was stuck on 99.5% and needing a few more gold bricks, be sure to check out this thread which helped me - (I take NO credit for the thread)
http://www.xboxachievements.com/forum/showthread.php?p=66213...Also, ensure that all map/point kiosk locations have been visited and they appear on the map using the
button.