Warning Forever is an endless Shoot 'em up. It features several unique mechanics.
The bosses will evolve differently depending on where you shoot them. The game ends not
when the player is out of lives, but when the timer runs out. Time is added when a boss
is killed, whereas time is reduced when the player dies.
While originally released in Japanese, an English fan translation is available from
the translation group Aeon Genesis.
Inspired several Shoot 'em up games following it. These include titles such as Battleships Forever, Captain Forever, Warning Forgone, and Mothership Forever.