Warning Forever

Warning Forever is a freeware 2D shoot 'em up written by Hikoza T. Ohkubo and released under the name of his software house, Hikware.

The player flies a small green ship. There are no powerups - the player's only weapon is a very rapid-fire revolving cannon which can fire in any direction, and widen or concentrate its projectile spread. As is common in manic shooters, the area of the player's ship vulnerable to collisions is much smaller than the ship itself. This enables the ship to squeeze through small gaps.

The game is peculiar among shmups in which the game is organized into a sequence of stages, which may extend indefinitely, and each stage consists of a single large boss ship, which will evolve every time it is destroyed.