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The year is 2081. The Earth has become a devastated planet, overrun by monsters, controlled by a mysterious entity known as Increaser. The only hope to save the beloved Earth lies with you, a young warrior named Dan. You are sent in a time machine to the year 1999, when the monster invasion was beginning. Your task is to find your way through monster-infested labyrinths and to defeat the Increaser – whatever he (or it) is.

The game is an action platformer with more emphasis on exploration than on "jump & run" gameplay. You don't die immediately if a monster touches you, but have a life bar that gets gradually depleted as you are hit. Defeated enemies bring you energy points, which you can spend to buy upgrades. You start with a sword, but later obtain other weapons as well. The game's structure is not entirely linear; many areas have different doors leading to different places.


Bio-Senshi Dan: Increaser to no Tatakai NES A weird area with weird blue guys
Bio-Senshi Dan: Increaser to no Tatakai NES Do I look like I need advices from YOU?
Bio-Senshi Dan: Increaser to no Tatakai NES Don't touch me! Mama! I want to go home...
Bio-Senshi Dan: Increaser to no Tatakai NES Ooooh, baby! What can I do you for?

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Alternate Titles

  • "バイオ戦士ダン インクリーザーとの戦い" -- Japanese spelling
  • "Bionic Chaser Dan" -- Development title

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Cancelled US release

The game was scheduled for an US release under the title Bashi Bazook: Morphoid Masher. This release was eventually canceled.
Oleg Roschin (181737) added Bio-Senshi Dan: Increaser to no Tatakai (NES) on Feb 02, 2007