Summary: Space Invaders Extreme (Japanese: スペースインベーダーエクストリーム Hepburn: Supēsu Inbēda Ekusutorīmu) is a re-vamped incarnation of the classic arcade game Space Invaders. The DS and PSP versions were released to mark the 30th anniversary of Space Invaders which saw its original arcade release in 1978. An HD version of the game has been remastered by Backbone Entertainment for Xbox Live Arcade with new four-player multiplayer modes and visualizer backgrounds by Jeff Minter, it was released on May 6, 2009 as a wrap-up to the 30th anniversary. The game is played at a fast pace with an electronic soundtrack and sound effects. A sequel for the DS titled Space Invaders Extreme 2 was released in Japan on 26 March 2009, North America on 20 October 2009, and Europe on 2 October 2009.