Earn Gold Medal in Super Sheep Racing Training Mode:

Aqua sheep.

Earn Gold Medal in Euthanasia Training Mode:

Longbow power-up.

Earn Gold Medal in Rifle Range Training Mode:

Shotgun power-up.

Earn Gold Medal in Artillery Range Training Mode:

Grenade power-up.

Earn Gold Medal in Crazy Crates Training Mode:

All weapon crates have sheep.

Earn an Elite Rank in Deathmatch Mode:

Invincibility.

Complete Mission 4:

Laser sight.

Complete Mission 8:

Jetpack.

Complete Mission 13:

Fast walk.

Complete Mission 16:

Invisibility in net games.

Complete Mission 20:

Low gravity.

Complete Mission 25:

Indestructible landscape.

Complete Mission 33:

Super Banana Bomb power-up.

Gold medal and Elite Rank in All:

Full Wormage game options.