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|Thunder Force IV|
|Publisher: Tecnosoft, Sega (US)|
|System(s): Sega Mega Drive|
|Number of players: 1|
Thunder Force IV (サンダーフォースIV), called Lightening Force: Quest for the Darkstar in the US, is a 1992 shoot-'em-up by Tecnosoft released for the Sega Mega Drive. It is the fourth game in the Thunder Force series.
Shortly after defeating the ORN Empire in Thunder Force III, the Galaxy Federation comes under attack by survivors of the empire, who have banded together to form a new threat, Vios. Vios turns out to be more powerful than ORN ever was, and the Galaxy Federation must again use a new small craft to destroy their base on the planet Aceria.
Gameplay is almost identical to III: shoots (you have rapidfire), changes speed by 25% while holding the button down constantly adds 1%, changes weapon, and powerups are collected from enemies. Unlike III, however, you are not fixed to the camera motion; holding and will take you higher/lower than the screen limits (as in II).
The first four stages can be played in any order; the order listed here is the default.
|A world full of clouds, mountains, and waters. You spend two "days" on this planet, primarily shooting down basic enemies that either just attack, shoot homing missiles at you, or worse. A giant serpent-like creature will come at you several times. A train-like underwater being will send smaller enemies hurling at you while trying to hit you with a large laser, and the rising boss ship will make it easier for homing missiles to hit you...
|A blue ruin facing the void of space. Here you face larger robots on pedestals that are hard to defeat, pairs of laser-shooting shark-like beings, barriers that form as you move, and small, immobile enemies that generate themselves int he least convenient places. Halfway though you fight a giant robot that spams loads of bullets at you at once.|
|Possibly better called an outer space raid: you fly through an asteroid belt, avoiding the (multiple) turrets that constantly send bullets your way and follow your every move. You also have to dodge the regular enemies (they come fast) and avoid crashing into an asteroid. Halfway through, the astroids start moving at very high speeds, so pay attention to survive!|
|Fly through a desert sandstorm. Some enemies can take massive damage before going down.
|Battle the boss ship from stage one in space|
|Water and Ice themed world, with the path over and under water being almost completely different play experiences|
|Lava themed world with a cameo boss|
|A stage in a bio-mechanic environment which consists mainly of miniboss fights|
|Last "proper" stage with moving walls and traps|
|Sega Retro Average|
| Based on|
|Mega Drive, AU|
|Thunder Force games for Sega systems / developed by Sega|
|Thunder Force II (1989) | Thunder Force III (1990) | Thunder Force IV / Lightening Force: Quest for the Darkstar (1992)|
|Thunder Force AC (1990)|
|Thunder Force: Gold Pack 1 (1996) | Thunder Force: Gold Pack 2 (1996) | Thunder Force V (1997)|
|Thunder Force VI (2008)|
|Thunder Force related media|
|Thunder Force VI Soundtrack Demo (2008)|