Chaos version? What the heck is that?

@77 that version is for people who think the game is still too easy. You move way faster, and enemies are  tough from the beginning. There are a bit of funny bits here and there, and extra minigames I wish i could understand... The one that deals with yokotank I sort of understand it.. the goal is to become like a shield or something for him and he will attack enemies for you,but you get the experience faster so you can level up.. it still is hard or I am not understanding right. I think the Carla rematch one does not work but it would have been interesting.

re: black fireballs, well isn't fire supposed to be black anyway lol
I have never truly verified if they kill me but I am sure they will in just one explosion, even the large one that spawns them, correct?

They are supposed to burn you completely. 2000000000 damage.

@80
I found that the chaos version gave you the sonar at the tutorial and said "I was going to give you this here, but it was postponed a bit in the official version for some reason, so yeah, enjoy".
And the message when Carla dies is very funny. "Oh, Carla isn't there. But I don't care."

The disc puzzle is in fact always fixed. The discs are arranged differently every time, but the number for the solution is the same. So the paper isn't technically necessary.

And another update. Aren't you glad I'm so full of these?

Right, so bosses being tricky or long is fine. I've managed to figure out ways to stay alive and get the bio-control system down to lower health. Great, right?
Wrong. Here's what just happened.
It spawned a launcher, which spawned a security cart. Note I didn't hear either of these things. Said security cart spawned a big lime ball, which, again, I couldn't hear coming, and I got paralyzed. Before I could even move - as in, about a quarter of a second - the bio-control system used some sort of lightning attack - again, didn't hear it coming, no telegraphing at all, it was over 80 tiles from me, I couldn't even hear it humming - to kill me.
This isn't just hard, it's random and borderline unfair, especially on normal difficulty. If you want us to be able to deal with attacks, we have to be able to hear them. I can live with the stamina-killer-syringe thing because it's like 100 damage and a stamina drain rather than, y'know, instant death, but the combination here is just brutal. If I'd managed to get to my items to use a stun recovery I'd still have been pelted by thunder I couldn't hear coming. How again are you supposed to actually deal with a two-hit-kill attack that hits approximately once per second that you can't hear coming? I'd really, really like to know.
Incidentally, both playthroughs of this game I've seen on YouTube which tackle this boss use overpowered weapons in order to take it down, so it's not as if I can even listen to someone "do it right", as it were.
I thought I was doing pretty well there for a bit, had the boss down to about 46% health...and then random death. Not happy. Not happy at all.

well, I have not been able to unlock the Carla rematch level then, how are you supposed to do this? and I wish I could know more about what is going on in the yokotank food level. Right, the chaos version does tell you that you have a compact sonar from the tutorial.

And...yeah. It tracks all right. I heard about half a second of aap, got stunned, instantly hit x, used a stun recovery, tried to move, got zapped again and died.

So, um.

This is not reasonable. Not even for a so-called final boss. And I suspect it only gets harder from here. This time it was down to 36%, by the way, and I've learned that kiting it (that is, staying about 45 tiles away and pelting it with stuff and then running away) seems to be the safest strat. I don't dare get closer because that alternating electricity thing is so, so fast. Thank god the energy beams are slower. I just wonder what's going to happen when it starts shooting fast missiles, healing itself and producing blade traps to defend itself. I mean seriously. This is another one of those things I'd have liked to see more on higher difficulties. Maybe on normal it should spend 50% of its health bar doing what it does in phase 1 (alternating electricity, energy beams) and the other half doing what it does in phase 2 (creating launchers occasionally, gaining the dragon's fire and ice attack). And then on higher difficulties you can start adding the other stuff.
Of course, for things like this I don't actually expect anything will happen, because obviously others can do it. Note the apt title of this thread. I must suck, or I wouldn't be struggling this way. Nevertheless, I'm not exactly a terrible audiogamer in general, and I'm wondering at the difficulty vs. the need for that difficulty on a first playthrough. I'd love to hear someone beat this thing with the triple yoyo, super buster blade, stuff like that. Both youtube playthroughs use either the water master or some other overpowered water weapon.

Anyway, sorry to gripe, but this is sort of upsetting me. I feel like I'm very close to the end and might be onto something, but at the same time I expect that having five big bosses around the field in the next stage is just going to provide me way, way too much chaos. Unless they're all a little more frail than this one.

I'm assuming it's the .dat file buried in the Nyanchangame folder?
If so, I'll stick it in dropbox and send you the link. Does that work/make sense?

Right, so. It's definitely doable... but if you favor ranged over melee, it'll definitely take you a longer time. I basically just kept about 10 steps ahead of the BCS, waited for it to start shooting electricity, ran behind it, put on a power drink and slammed it with the acrobat pistol over and over. would've worked much better if you'd had the enhanced one, but hey.
That, and use of the megaton hammer pretty much sealed the deal. I did not record it, but I could do it again and actually show you what I'm doing if you like. The arrow shot also does some respectable damage to it, but you didn't actually make any ammo for it. Or if you did, you used it all before then.

So I tried it with the megaton hammer, and that's much, much faster. You folks aren't kidding about that. Still died horribly to (you guessed it) the thunder attack, though this time I got it to about 35% health.
That thunder thing is just mean. I'm sorry, but I really don't know how to get around it. And I don't mean the alternating bolts. Those are tricky, but not especially dangerous. Each hit of the hammer even without a drink was doing like 3% of its health, which definitely makes an argument as to why exactly bullets don't work on everything. I didn't think the yoyo would count there, but oh well.
Looks like if I get to subsequent playthroughs I'm going to need a mix of stuff.

And this doesn't even scratch 25.5, which I'm sure is going to give me fits.

The key to dodging the thunder is to just not stop moving, it tracks your starting position where you were when that warning zap sounds, but it won't follow you if you move even 1 space.
Also, here's a thing. It wouldn't have taken nearly so long if it didn't keep teleporting all the way to the other side of the whole damn field... lol.
About the super acrobat pistol, what I meant by it'll do in a pinch is like, it'll work, but only if you're willing to be right next to your target. In this fight, the only truly safe time you have for that is if you're close enough when it starts throwing bolts. I'm pretty sure as far as pure DPS goes, it actually does more than the megaton hammer...