Change moons size
During the night when the moon is out Go and get a sniper rifle.Then aim at the moon and shoot.
Gant Bridge Message
First, get a jet-pack and get to the gant bridge. Fly on top of the first collumn to find a message saying " There are no Easter Eggs Here. Go Away!"
Sex Toy Weapon
In Los Santos, go inside any police station and go into the shower room. Inside you will find a purple sex toy you can use as a very powerful weapon.