Karous

Karous is a unique vertically scrolling shoot-'em-up developed and published by Milestone Inc. It was originally released on November 15, 2006 for the Sega NAOMI GD-ROM arcade platform. You take the role of a mysterious girl named Karous, who commands a tiny fighter ship and attempts to destroy an evil armada bent on world domination.

The weapon system is based on Radio Allergy, but it uses a unique D.F.S. bomb system.

Bombs can be used when SP gauge is full. When a bomb is activated, a barrier surrounds the player, which can damage enemies within the barrier. For the duration of bomb activation, the player is invulnerable. Enemies destroyed by the barrier provide more experience points to the player.

The player's shot, sword, shield can be upgraded by using experience items dropped from enemies, with a maximum of 100 levels. Weapon levels also act as score multipliers.