We're making iceberg tiers? Nice.

I think that if we are going to make "iceberg" list memes, put these in one thread, and not in this sub-forum.

A silent film based on Edgar Allan Poe tales? Sign me up!

That honestly doesn't really sound that deep in comparison to what kind of lost media I know of.

That's exactly what I meant actually. None of these are as obscure as some lost media I myself know of.

Ok, here's a list of super obscure lost media I know of:
Satellite City: A British-Welsh animated series that aired in the late 1980s, & early 1990s. Only the intro, a couple of images, & a small clip have surfaced of the show.
The Magic Pencil: Another cartoon, this time seemingly of Israeli origin. I can't find any information on this one at all, which actually makes the show look creepier than it already was(seriously, it looks like an uncanny version of a Looney Tunes cartoon, mixed with a bit of Chalkzone, making for a rather cursed looking show). Here's the intro to this extremely cursed cartoon.
Outpost: A Commodore 64 game by Frontier Games, & one that's actually of a strategy game. I made a page dedicated to this, which can be seen here.
Pim Wright: A French cartoon starring human-like vegetables. A few images of it exist as well as what seems to be the theme song(it sounds like stock music though).
Mad: We're not even sure if it was anything more than a bunch of SID files with jingles, & a full track composed by Adam Gilmore. Not even he can remember anything about these. This one I did make a page for.
Cop Slapper: Yes, this apparently existed at one point. It was an unlicensed NES game by Color Dreams that was allegedly never released. Someone claimed to have the prototype of this game, but nothing of the game has been confirmed. This one I really want to see be found simply because of THE FREAKIN' NAME. Just... COP SLAPPER. Doesn't that sound like one of those kind of games that's intentionally meant to offend the government in a hilarious way!? I freakin' want this game to be dumped so badly. That name man... it gives me the funnybone overload I need.
Crazy Cars Atari 2600 port: Nothing of this has been confirmed, & I made a full page detailing this mysterious game.
Empire Vision: A partially found Commodore 64 game. It's unknown as to which company it was made for, & there are currently no development credits available. It's speculated that the game was perhaps a little too complex for some publishers to handle. Fred Gasking made a page on GTW64 about it.
Pshushon: Another Israeli cartoon, though we at least have full episodes of this one... well 2 that is. I have a playlist on my channel that has the intro, & the 2 episodes.
Killerplants: We've been seeing several Commodore 64 games, & here's another one to add on to the list. Once again, no credits on who had any involvement in the game outside of the crackers(you probably don't know what that means). Credits seemingly do exist at the end of the preview, but they're very corrupted. Once again, Fred Gasking did it.
RSD Game Maker: Oh boy, talking about this one will be a doozy considering the amount of information I have put through inside my big brain, so I'll just give you a link to the page I made for it. Note that some of the games contain some NSFL/NSFW content.
Cupido: A French cartoon about a cupid going around town pulling out heart-arrows at random civilians so that the town would not be a toxic society. Both the original French version, & the English dub are lost. The intro to the French version is available(as well as a Hebrew intro), whereas the English dub is completely lost.
Space Cats: Of course I just had to mention this mind boggling piece of lost media. This show is an absolutely wild rabbit hole of its very own, from having more episode titles than the supposed number of episodes, 2 episodes that I can't really pinpoint on what they're called, that Worthpoint auction allegedly containing 1984 material for the series, whether, or not the original masters are still available(at this point, they might actually be heavily damaged), etc. There's so much to uncover with this wild mystery of a series to the point that I'm not even sure if Paul Fusco HIMSELF would be a good way to help out with the search, or even gives us any info for that matter!!!
Gotron: A game that was apparently available on the US version of the Sega Channel for some time... and that's all we know about it. We have no idea what the game was even like, so your guesses are as good as mine.
Seal To Whales: A lost Atari 2600 game by Datatech that was apparently also released by Home Vision as Whales. I made a page on this one, & tried as much as I could to fit as much information as there was for this game.
Entropy: A PS1 game by Psygnosis that was shown at E3 1995... supposedly. I'm not really sure if this game legit existed, or not. All I know is that Psygnosis never released a PS1 game with that title.
Another Brick: The World of Spectrum had a page on this game. It was released by Geppone Software in an unknown year, & it was to be played on 48K Speccies. No other info about it exists online, & I'm not really sure if it even exists.
Rap Attack: Yet another unconfirmed game, this time on the SNES. The game was listed on a May 1992 advertisement for the Chip & Bits store where it's listed as a shooter for $54. I'm not sure on this, but I assume it has nothing to do with Rap Jam Volume One.
Tramix: A game released for both the ZX Spectrum, & BBC Micro by DK'Tronics Ltd. The only thing I could find on it was the inlay for the ZX Spectrum version.
Monster Mania: A 1995 animated series. Part of the intro, & a promo is all that has surfaced of this cartoon.
City Warriors: A Commodore 64 game that was allegedly advertised on page 39 of the Complete C64 Guide. Nothing else about it is available on the internet, & most of the page I made on it is speculation.
Fantomcat: Apparently some episodes of this series, including the majority of season 2 are lost. It's a Cosgrove Hall cartoon from the mid 1990s, & it's believed that the show was never released on DVD.
Cargo Contest: The Winning Combination: Apparently this was a ZX Spectrum compilation tape with 4 games on it, a Scramble clone called Computer Bomber Game, a tennis game called Computer Tennis Game, a Pac-Man clone called Computer Truckman Game, & the main game, Cargo Contest. It's currently unknown if any of these games were released on their own, there are no mentions of this on the internet outside of the World of Spectrum, there is no known company involved, we don't even know the year this came out, & only the inlay has ever been found. It seems that this might've been like those Nintendo Championship cartridges that existed on both the NES, & SNES, only this is for the ZX Spectrum, which might make it a really rare item. Perhaps a gold edition exists too?
The Little Witches: A page on the Lost Media Archive exists for this insanely rare French cartoon, but not one on the modern Lost Media Wiki.
Primo Le Savant: A 1978 cartoon series with only a single image available on the internet, which can be seen here.
Balla Balla: Yes my friends, there is a game called that, & on the Commodore 64 once again. It's like a 2D version of Genias's Tilt. Only a one level preview has surfaced, & it's unknown if any more of this game exists.
Leon the Chameleon: Probably not to be confused with the book, this is a cartoon that I can only find a single image from. Reportedly, this is from 1983, & there's literally no information about this show on the internet.
That's all for now. I still know more obscure lost media out there. If you want to know more, let me know.