R-Type/Nightmare Fuel

Some game designers have issues. Irem has *subscriptions*.

Final's worst ending. You never even realise what's wrong...
The Bydo Empire enjoy using this as a part of their total warfare against humanity on all fronts. They want humanity to feel fear and confusion as to what they are.
Delta's Final Stage. That is all.
Not to mention the entire concept of the Bydo's "wave" form. Imagine that for a second. A wave, as quick and unobtrusive as a sound. And all you need is to get close for it to begin taking over.
R-Type 3 features a level which appears to be set in a gigantic alien's stomach, until you reach the end of the level and the boss is a series of orifices that deploy giant sperm at you. And then there's Cyst / Gomander, one of the most disgusting vagina monsters ever created.
The Final version of Dobkeratops features a phallic tongue that appears to deploy sperm. The vagina boss also makes a comeback.
Stage 5 of Delta. Fending off enemies from the original R-Type wouldn't be so bad if not for said enemies being dilapidated husks and the acid-trip landscape. And things get worse in the last two stages.
Stage 6 of Delta has a space station... infested with flesh and blood and gore. As for the enemies- Body Horror dog-things, bouncing brains, some organic ship, etc.
The Sweet Memories in Final, meanwhile, is Nightmare Fuel on account of literal Nightmare Fuel. That vessel's Dread Wave Cannon is actually loaded with the pilot's own nightmares.
- "Dread Wave Cannon" is just a nickname, however. Its real name is "Illusion Wave Cannon", and the images you see when it fires are not indescribable horrors straight from the darkest parts of the pilot's mind, but...images of the planets Saturn and Venus, and the Greek Parthenon.

In R-Type Final, one ending features the player's ship being posessed and turned into a hideous organic blob by the Bydo. You proceed to fight your former comrades, with the final words of the game stating your pilot never even realised what had happened. "Why are the seabirds the only ones happy to see me on this beautiful summer night?" - Recovered Voice Recorder
- Funny thing about that: When you start the first stage, that weird thing that goes zooming past you? That's your future self mentioned above.
R-Type Delta's final stage: the background is a constantly shifting mirage of all of humanity's accomplishments, fading away as though they are nothing. The enemies include giant sperm, blue-skinned, red-eyed babies encased in crystals (complete with a baby-like cry when they appear on screen * shudder* ), and giant regenerating strands of DNA. All with a very creepy vocal track. And if you're playing as the R-13? You get stuck in this nightmarish dimension and are forcibly transformed into a Bydo! Only to be killed later in Stage 3.5 of R-Type Final. Somehow the stage manages to be worse than the actual nightmare the pilot has earlier (Stage 5).
Part of that stage is copied from the final scenes of Akira. This is not a good sign.
For that matter, the origin of the Bydo: the games' story makes it clear that future humanity made them, which is bad enough, but if you examine the supplementary material, it reveals that the Bydo are human! More specifically, they are what humanity would become if reduced to its most base and evil instincts and left alone to fester and evolve for millennia. They are actually physically incapable of feeling any kind of positive emotion. Future humanity engineered them that way deliberately!

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