A 1988 PlatformGame starring a boy and his mecha suit, which appear in alternating sections of each of seven levels. The boy is only armed with a sword, but he can buy bombs and better swords which the mecha suit can use in the harder second half of each level.

The game originated in Japan as ''Mashin Eiyuuden Wataru'', a LicensedGame based on an anime by {{Creator/Sunrise}} of the same title, but when NEC Home Electronics released it in the U.S. and made it the pack-in game for the TurboGrafx16, they retitled it ''Keith Courage in Alpha Zones'' and wrote a new plot involving an AlienInvasion by the Planet of B.A.D. (Beastly Alien Dudes).
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!!Tropes:
* AmericanKirbyIsHardcore: [[http://www.vintagecomputing.com/wp-content/images/retroscan/kk_page_1_large.jpg No]] [[http://www.blogcdn.com/www.joystiq.com/media/2008/03/watarukeith.jpg kidding.]]
* {{BFG}}: The enemy Titan Guard carries an enormous pistol on top of its head.
* CriticalExistenceFailure: If Keith is killed while in the [[PoweredArmor Nova Suit]], it explodes.
* DeadlyDoctor: The enemy Dr. Sting flies through the air and throws syringes.
* DegradedBoss: The first boss is a recurring {{mook}} in subsequent stages.
* DualBoss: The fifth boss is a duo of two {{Recurring Boss}}es, and the FinalBoss is a PaletteSwap of the fourth with the addition of an invincible companion. The first boss also comes in two.
* EverythingsBetterWithRainbows: Levels are connected by a Rainbow Transport.
* FlyingFace: The Skulls and Long Bones.
* FunWithAcronyms: Keith fights for N.I.C.E. (Nations of International Citizens for Earth) against B.A.D. (Beastly Alien Dudes).
* TheGoomba: Zakkos, frequently {{Palette Swap}}ped blobby little creatures that do nothing but walk.
* InconvenientlyPlacedConveyorBelt: Conveyor belts are all over the place in both parts of the last zone.
* LeapOfFaith: In the Underworld sections, constantly.
* LethalLavaLand: Fire Zone, the third level.
* LongSongShortScene: The Rainbow Transport music is quite a bit longer than what is heard in-game.
* MoneySpider: A lot of different creatures drop golden coins.
* PinataEnemy: The flying cats are the best resource for money grinding, especially given that killing sixteen of them will spawn a golden version with a more valuable drop.
* PoweredArmor: Keith's Nova Suit is depicted as this in the manual's comic, however, in the original anime, it was a HumongousMecha.
* RealSongThemeTune: The end credits theme is an electronic rendition of "Step", the anime's first opening theme.
* RecurringBoss: [[DegradedBoss The first boss later reappears as a mook,]] Stitch and Baron Chairman return as a DualBoss in Stage 5, and Mr. Roboto, ThatOneBoss, receives an upgraded PaletteSwap for the FinalBoss battle.
* RespawningEnemies: Enemies spawn continuously if you hold in one position, which is useful for money grinding on the overworld levels.
* SlippySlideyIceWorld: Glacier Zone, the fifth level.
* SpikesOfDoom: Touching spikes is [[OneHitKill instant death]] (same as a BottomlessPit), and since Keith only has one life, it's back to the beginning of the level (or game) if he dies.
* TraumaInn: There are hospitals in the overworlds where Nurse Nancy will heal your wounds for gold.
* UndergroundMonkey: The [[FinalBoss Titan Warrior]] is a golden version of Mr. Roboto.
* {{Wackyland}}: The Reverse Zone has upside-down pieces of ground in the air.
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