Hidden rare weapon chest in Rust Commons West 
Go to the far northwest corner (on the map) in Rust Commons West. Find the rock 
wall with the gun tower on top of it. Stand near the left side of the gun tower. 
Then, crouch and stay against the rock wall as you move down the rocks. The 
warning sign may appear. Ignore it, and try to move as quickly as possible. The 
chest is basically in front of the gun tower, under a large rock overhang. The 
weapons chest has a high chance of spawning rare weapons. Note: It may require a 
few attempts to reach the chest. Once you get the weapons, you either must kill 
yourself or exit the game because there is no way to leave this area safely.

Secret "Fish" easter egg in Treacher's Landing 
Go to the secret dock (farthest south point of the starting position) in 
Treacher's Landing where you get the "You're on a boat!" trophy. Shoot the 
yellow barrel to the right of the dock. Then, shoot the green barrel in the 
distant trash pile to the east of the boat. Shoot one of the blue barrels on the 
boat. Finally, shoot the red barrel in the water to the left of the boat.

"Bandit Treasure" quest 
Fast travel to Old Haven, then follow the left wall to find a pile of dead 
bandits. Look for the glowing bandit or glowing key nearby to unlock the "Bandit 
Treasure" quest.

"Green Thumb" quest 
Fast travel to "The Middle Of Nowhere" Bounty Board. Get a car from Scooter's, 
and drive to the right. Look for the small shack with big plants around it. Talk 
to the man leaning against the shack to unlock the "Green Thumb" quest.