Space Pigs

The Space Pigs appear to be Earth's Bad Piggies (except for Fat Pig, Alien Pig and Hektor Porko).

Past
Long ago, a group of Bad Piggies attempted to launch a submarine off Piggy Island's Shipwreck Shore. Instead, they found themselves launched into the galaxy. After initially pretending to come in peace, Space King Pig invaded every planet in the sector, claiming a moon tank and a claw as his own. Memories of their former island home gradually faded into legend, until the Angry Birds appeared in space. It is known that Space King Pig used his UFO's grabbing claw to steal eggs which caused the Flock to follow the claw through the wormhole and end up trapped in the world of Space.

Angry Birds Space
In Angry Birds Space, the Space Pigs appear as the antagonists of the game with them debuting one by one with the first being the space Minion Pigs debuting in the first level and the last being Hektor Porko debuting in Brass Hogs. In gameplay, the Space Pigs function the same as their original counterparts except that the Space King Pig is an actual boss instead of a normal enemy.

Pigs

 * Space Minion Pigs - Footsoldiers of Space King Pig.
 * Space Corporal Pig - Wears a metal helmet and has a five-second memory.
 * Space Foreman Pig - The right hand pig of Space King Pig. He's the oldest of the Pigs, and oversees all construction. Even though Space Foreman Pig first appeared in levels of Cold cuts, his first appearance as the main antagonist is in the episode Fry Me to the Moon. In Fry Me to the Moon, he appears in all 10 levels. In level 3-10 as he floats along with the Space Egg he captured right next to him. After the events of Fry Me to the Moon, in the newest update of Utopia, Space Foreman Pig also appears in the levels of Utopia.
 * Space King Pig - The space equivalent of King Pig Smooth Cheeks of Piggy Island. Space King Pig has a UFO with grabber claws and appears to be responsible for the Flock getting pulled through the wormhole into Space. It was Space King Pig's idea, while still the King Pig to steal eggs from the Birds in the first place. As Space King Pig, he has some new goals, including stealing the Eggsteroid and continually feeding Big Bork. He first appears as a boss battle in level 1-30 in a UFO Tank and then in Cold Cuts level 2-30 in a UFO Spaceship. Eggsteroid level 7 features Space King Pig's first appearance as a common enemy. Also in Eggsteroids level 7, there is more than 1 Space King Pig.
 * Fat Pig - A fat pig who first appears in Cold Cuts who was freed when the ice broke. He loves popcorn and was later fought in Utopia and was defeated there.
 * Alien Pig - An alien pig who only appears in Cosmic Crystals and was defeated by the Space Flock.
 * Hektor Porko - A unique pig who appears in Brass Hogs and the Mirror Worlds levels though he was defeated by the Space Flock.