Sucker Born Every Minute Trophy:
The description for the Sucker Born Every Minute Achievement/Trophy says "Paid for a worthless tour of the world's largest bullet." Go go the huge bullet and there should be a building closest to the bullet. There will be arrows pointing to a box with a $ sign on it. Simply activate the prompt here to get the Trophy.
Making a Monster - Built the New Car: Monster.
Athena, Out - Rescued Athena.
Depot Demolition - Destroyed Lance Depot.
Sneaky Little Buggers - Killed each of the loot midgets.
Speed Kills - Destroyed a Lancer while in a Racer.
Ding! Overleveled - Reached Level 51.
Completionist - Completed all missions in Secret Armory.
Sucker Born Every Minute - Paid for a worthless tour of the world's largest bullet.
Vincible - Killed Crawmerax the Invincible.
Ding! Overleveled to 11 - Reach Level 61.