Warning Forever

Warning Forever is a freeware top-down shooter developed by a Japanese 'company' known as Hikware. The premise of the game is to fight a constant stream of bosses. There are no powerups, and the initial weapon is a revolving cannon that can fire in any direction, and widen or concentrate it's scope of fire. It receives a boost of popularity after being featured on 8-bit Theater.

The main catch, or gimmick, in the game is how the boss changes. Depending on how you fight the boss, it changes itself to defend against your strategies, and prey on your weaknesses. For example, if you destroy the front part of the boss first, it will increase armor on the front. Likewise, if you are killed by a certian kind of weapon, but still defeat the boss, the next boss will probably have more of that weapon.

There is one initial boss, the Pure Heart, and nine other intermediate evolutions; Muramasa, Phoenix, Berserker, Scoprion, Hekatoncheir, Big Magnum, and Hammer Head. After that, there are four final evolutions; The Infinity, The Apocalypse, The Catastrophe, and The ISE-ONE. The first three final evolutions come after the nine intermediates, but the ISE-ONE is a direct evolution from the Pure Heart.

The game begins with 180 seconds. You gain 30 seconds for every boss you defeat, but lose 20 seconds every time you are defeated.

There is an english patch for this game. There is a link on the Hikware site.