quote Wikipedia

The origins of the game lie with the original classic arcade game Space Invaders. However, Space Invaders Get Even puts a twist on the formula by letting the player control the space invaders themselves.

Unlike the original game and its spin-offs, Space Invaders Get Even sees players piloting the UFO across a landscape rendered in 3D graphics, which encompasses areas such as cities, forests, oceans and military bases. Players move the UFO with the Nunchuk, and then use the pointer function of the Wii Remote to direct a swarm of up to 100 invaders in blowing up buildings and destroying the defending forces of Earth. The invaders, which are rendered as flat, glowing two dimensional sprites which resemble the invaders in the original game, are split into three types, each with different attributes. Upon eliminating all opposition in the stage, the player must then take on a large boss, which include a giant tank and a huge battleship.

The game will feature downloadable content in the form of additional stages. Players will also be given the option to replace the UFO with ships from the Darius and RayForce series of shoot 'em ups.