''[=GunNac=]'' is a ShootEmUp by {{Compile}} released for the NES in 1991.

The game's plot tells the story of a far-off artificial solar system named IOTA [[IncrediblyLamePun Synthetica]], which is being colonized by the people of Earth due to depleted resources. The real trouble begins when a wave of cosmic energy causes animals and even inanimate objects to come alive and start attacking the people. All is not lost, for the [[TheFederation Space Federation]] has enlisted the help of Gun Nac! Gun Nac's mission is to search to system's 7 planets for signs of hostile forces, perhaps even an [[AlienInvaders invader]]...

While ''[=GunNac=]'' is fairly obscure, it is rather popular for its smooth gameplay, detailed graphics, and quirky setting. It also has an unusually high degree of customization.
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!!'''Tropes Associated With Gun Nac'''

* AllThereInTheManual: Averted. One version of the game's plot story is illustrated in cinematics upon the game booting up.
* AttackOfThe50FootWhatever: And there are plenty of 50-foot whatevers to go around.
* BeamSpam: The Type-5 Weapon, especially when fully upgraded.
** This also applies to the flamethrower (Type-4) weapon. Despite the beams becoming shorter the longer the fire button is held, repeated tapping the fire means not having to worry about it losing its range.
* BonusStage: Area 0, accessible only from the level select.
** Also qualifies as a [[BrutalBonusLevel brutal bonus level]] due to a lack of weapons, scarce power-ups, and scant bomb supplies available.
* CasinoPark: Area 5.
* CheatCode: Holding down both the A and B buttons during the intro story will give you the option to activate Non-Death.
* CollisionDamage
* EasierThanEasy: Novice difficulty + Non-Death = Why bother playing?
* EasyModeMockery: If you beat the game on Novice difficulty, you won't see the full ending. This is also true if you have Non-Death activated, [[NoFairCheating no matter the difficulty]].
* [[EveryTenThousandPoints Every 10,000 Points]]: Extra ships are earned at 30,000 points, at 100,000 points, and at every 200,000 points.
* EverythingIsTryingToKillYou: ''Quite'' literally. Everything ranging from [[KillerRabbit bunnies]], lighters, toilet paper, umbrellas, coins, pottery... and so forth.
* FireIceLightning: The sub-weapon bombs come in four flavors: Blizzard, Fire, Thunder, and Water.
* GettingCrapPastTheRadar: The Stage 3 mid-boss is a humanoid mermaid. In order to defeat her, you have to blow off both of her arms.
* GodMode: Non-Death.
* HomingProjectile: Weapon type 3 in Gun Nac's arsenal, as well as some of the enemies' attacks.
* KillItWithFire
* LethalLavaLand: Area 2.
* MadeOfExplodium: Everything.
* MakingASplash: The Type-W bomb fills the entire screen with a cascade of droplets, arguably making it the most effective of the 4 bombs.
* ManekiNeko: The mid-boss in Area 5.
* MercyInvincibility: You die in one hit, so thankfully ''every'' item you pick up makes you invulnerable for a split second.
* {{Miko}}: The girl in the extended intro and ending scenes.
** It is implied that the shrine maiden ''is'' Gun Nac.
* MoonRabbit: Area 1 is nothing but this trope.
* MultipleEndings
* ''NickArcade'': Notable because it appeared on some episodes with the so-called "Nick Arcade Beta" version of ''Sonic 2''
* NintendoHard: Expert difficulty + Ricochet of Bullets + Speed Has Priority = Aggrivation.
* OneHitPointWonder: Partially averted. Picking up a Wing upgrade not only allows more powerful guns to be used, it also allows Gun Nac to absorb one hit without exploding. However, without a Wing attachment equipped, it's one hit, you're dead.
* OneUp: Not only provides an extra life, but it also doubles as a Wing attachment. Depending on whether or not the ship has a Wing attached, each 1-up token collected potentially allows Gun Nac to take up to two extra hits per game.
* PlayingWithFire: Type-4 weapon is a massive flamethrower. Possibly the most useful of the 5 types, especially when coupled with the Wing upgrade.
* RuinsForRuinsSake: Area 6.
* SingleUseShield: The Wing power-up.
* SmartBomb: One of the power-up items.
* WhenTreesAttack: Area 4 lives and breathes this theme.
* WidgetSeries: From the moon/rabbit symbolism to fighting a lucky cat figurine in Area 5, I'd say this game fits the criteria well.
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