This is my first thread on this forum, but it's mainly because I literally don't know anyone else who knows what I'm talking about (and to this extent)! So Altered Beast is a game that, despite being included in almost every Genesis and Genesis compilation known to man is somewhat unexplored. Over the years some codes for the game have been discovered (one is smackdab in the manual), but no one has ever really taken a dive into it like many have for other Genesis games. Well, after a few months of some madness and my sleep-deprived cries for help going unheard, I think I found... something. Not sure what it is. You'll see why later. Normally this is where I'd post the backstory of how I got here, but I actually already wrote about it in another forum for posterity. Here's a excerpt from the slightly incoherent 1 AM post: Spoiler so a little while ago i was grinding on altered beast on my genesis mini. i could go on about how i think the game's interesting and how with a little tweaking it could be fun but that's not what i'm gonna get into here. but this game i feel is a lil unexplored and it's what makes the following text rather bewildering since i can't find much of this online. so i went to go and play the arcade version and it's... a experience, but anyways i went back to the genesis mini for grinding and after beating the game many times and working my way through the game's jank i decided to poke around at the tcrf page and find out altered beast has a sound test. so inbetween sessions i would go and use the sound test to listen to the music. it's pretty good, but i noticed that a lot of the songs lasted a LOT longer than i expected and several of them have instruments i couldn't really hear ingame since anything i'd do would interrupt the drums or melody. during one of those sessions i was poking around with the sound effects when i noticed that a LOT of them don't seem to play in-game. i put it in the back of my mind to "marinate" as most of my observations do, but the more i was playing the game the more i began to realize "wow many of these sounds don't even play... but when they do they're cut off". after talking to a friend about it i decided to do a bit more exploring and i find that a LOT of the sounds i just could not pinpoint where they were played. In short, Altered Beast's sound is a jungle. There's a whole lot of sounds and music that just aren't fully heard unless you go out of your way to DELIBERATELY make the werewolf not do anything for a solid minute or so (the music's drumline for example gets interrupted a ton), and some sounds either cut off or just aren't fully heard. What I want to focus on is the unused sounds. Inside the sound test, there is a whole swathe of seemingly unused sounds. There's a duplicate of the first level theme, and there is what seems to be a unused series of sound sequences meant for the end=of=level Neff cutscene. For context, in the Arcade original there's a lot more sounds when Neff takes away your energy orbs. But in the Genesis version, there's suspiciously... not much. As it turns out, these sounds are actually still in the game. They just... don't play? Here's the entries: AA - Neff's portal (used) A4 - Neff's head drone (unused) B9 - Neff taking away the energy orbs (unused) EA - PCM sample of Neff laughing (used) I've tried various ways to get these sounds to play in-game, assuming they were just interrupted somehow, but I just couldn't. These two sounds in the sequence are straight up unused. One sound of note is this "sproing" sound. I have never heard this sound in-game before. Either in the Arcade or Genesis version, I can't figure out where these might've been used. At first I thought it might've somehow been a Little Osomatsu leftover (another 1988 Sega title), but having played that game there's no sign of that sound in that game too. There's a lot of harsh, sustained sounds in the sound test, but only the sound of Neff transforming and exploding come to mind that are actually used. E0 seems to not be a sound, but a "fade out" command that seems to break with certain sounds (I have a theory this might involve the YM2612 not knowing what to do with suddenly stopping sounds like this). PCM samples can't play at the same time with music/sounds, as it causes the FM sounds to briefly sustain or stop. Now, I believe there may or may not be more sequences in the ROM. But I don't have much experience with 68k assembly (I only know how to do mspaint graphics and move single bytes using the move and add commands), and I only know how to play games. I've made a long list of all the sounds in the accessible sound test, and I have no real way of knowing what sounds are actually unused or if some of them are simply interrupted or have a highly specific edge case use without lots upon lots of playing. I've only played the game with one player, so maaaaaybe there's additional sounds when playing with two? But I checked videos of two player sessions and I couldn't find anything out of the ordinary. I don't know how to ROM hack the game, and from what I've seen while googling not many have either. So I've come here to present my findings, and I'm hoping someone more seasoned and experienced can find and pinpoint more on this game's sound. I also don't know if there's unused graphics but that's because i havent actually looked into the games graphics as i know nothing on that front. So those are some of my findings. Hopefully some of this weird swamp of sounds can be cleared up.