[[http://db.tigsource.com/games/nikujin ''Nikujin'']] is a PC FreewareGame made by japanese developer Ikiki in 2006 that became one of his most well known games. In it, you play as a naked ninja, who’s goal is to progress through a ninja fortress of increasing difficulty, utilising your ninja skills to ensure your survival.

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'''This game contains examples of''':
* ActionBomb: The red ninja who'll run at you while screaming to explode in your face. You need to call his attention wisely so he'll take out iron doors.
* AuthorAppeal: Nikujin wasn't the first of Ikiki's games featuring naked people killing each other stealthly, nor it was the last.
* BarbieDollAnatomy
* BonusStage
* CeilingCling
* CheckPoint: Only the tutorial level features those.
* CrowningMomentOfAwesome: The ending.
* EndlessGame: The survival mode.
* FullFrontalAssault: No, really, all the ninjas in this game are naked.
* GoombaSpringboard: Stabbing enemies in the head has this effect.
* HighlyVisibleNinja
* InstantAwesomeJustAddNinja
* {{Ninja}}: NAKED Ninjas!
* NintendoHard: Definitely.
* OneHitKill: The GoombaSpringboard move mentioned above. But it only works if the enemy hasn't seen you. Bosses are vulnerable during certain parts of their moves.
* StealthBasedGame
* ThereIsNoKillLikeOverkill: What Nikujin does to his enemies' boss at the end.
* TrialAndErrorGameplay: Make any mistake and even if you don't die, you'll probably [[UnwinnableByMistake have to kill yourself and start over.]]
* WallJump
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