It's my last item to get before I've gotten everything, feel like ive circled the Map multiple times. Any help appreciated!

Once he gets to his second phase and he's mostly invulnerable, the only way I can hurt him is when he encircles me. This is taking forever. Missiles, depth charges, electricity and the charged laser don't get past his invulnerability, but is there something else I should try?...

Interested to see which ending people are seeing to reach. I like them both, but weirdly I like the bad ending more than the good lol.

Hi, I'm in the second map area of the game and I'm stuck. I got the explosive part in the bottom left fine, but the two on the right side appear to be inaccessible, and the one in the top left I can't get to. One of the passages near the top left has an eel body, but I can't find the eel head anywhere. Above that, there's one of those doors with starfish like creatures on it. But I only have torpedo and drill which don't affect those. I seem to be missing the second alt wep, is that what I need? What am ...

I can't wait to finally finish this game! I grabbed it back in early access and played through the first two areas, and then decided to wait until it was finished to keep going, because I could see how disappointed I would be if I kept getting into it and couldn't finish it. That was a mistake however, as I forgot nearly everything about the game in the intervening time, and have basically stumbled my way through the third area getting reacquainted with everything. So I assume there is something obvious I...