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The human colony "Le Tau" is under attack by some strange aliens. It is the player's job to use a special starship and destroy everything which moves. Heavy Unit is a typical side-scrolling shooter with six levels filled with enemies, mid and end bosses.

Destroyed enemies may leave behind items which have beneficial effects when collected: increased speed, better weapon power, a shield, extra lives or transformation into a robot. The robot has a more powerful weapons system (laser beam and homing energy balls instead of a vulcan gun), but also a downside: its large size makes it easier to be hit by enemies or crash into the environment. If that happens, a life and all collected upgrades are lost and the ship is reset at the last checkpoint.

While the level layouts are identical in all versions, there are some minor differences in enemy placement, graphics (e.g. the Genesis version has more colours and bigger enemies) and sound.


Heavy Unit Genesis Lots of enemies
Heavy Unit Genesis Level 1.1
Heavy Unit Genesis This thing is indestructable
Heavy Unit Genesis A mid boss

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Alternate Titles

  • "Heavy Unit: Mega Drive Special" -- Mega Drive title
  • "ヘビー・ユニット" -- PC Engine Japanese spelling
  • "ヘビーユニット メガドライブ・スペシャル" -- Mega Drive Japanese spelling

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User Reviews

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Critic Reviews

Génération 4 Feb, 1991 81 out of 100 81
Computer and Video Games (CVG) Mar, 1991 75 out of 100 75
ASM (Aktueller Software Markt) Feb, 1991 8.2 out of 12 68
Play Time Sep, 1991 66 out of 100 66 Jun 18, 2012 6 out of 10 60
Power Play Apr, 1991 46 out of 100 46


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Mobygamesisreanimated (11185) added Heavy Unit (Genesis) on Oct 15, 2005
Other platforms contributed by haynor666 (3018) and ryanbus84 (17233)