The Update Alpha 0.15.0: Friendly Update Title update for Minecraft (Windows) has 4 achievements worth 110 gamerscore.
Push a piston with a piston, then pull the original piston with that piston.
Breed a mule from a horse and a donkey.
Tame a horse.
Use a saddle to ride a pig, and then have the pig get hurt from fall damage while riding it.