[4] A cut-down version of the game called Space Invaders Extreme Z has been made available on DSiWare (Japan only) for 500 Points.

Ranking Mode is still the same as it was in the first game where the player must reach any of the 5-x stages and defeat the final boss without using a continue and not running out of stock.

This only allows the player to play through the easiest set of stages in the game with infinite lives.

The round is won by eliminating the enemies in the top screen in under 30 seconds, which activates Fever Time.

UFOs and gold items destroyed and collected respectively increase your bonus for the Fever Time.

Regardless of your previous weapon, Bingo Fevers force the player to use the most powerful iteration of the Bomb powerup.

The last and hardest to achieve Bingo set is Full House Fever, with a giant UFO being blocked by 200pt Invaders, half of which have an unbreakable barrier.

The player has an all-penetrating Laser that's twice the normal width in the game during this Fever Time.

There are several new wave patterns, backgrounds, music tracks and bosses in SIE2 as well as a commentator which you hear when the player achieves certain goals.

Shooting the following colors enables a special effect: A few changes are also made in Multiplayer; If you shoot a Round Feature like you would do in the single player mode, a large UFO will appear on screen.