Has anyone came across sentinels that can't be killed? I am in a bad situation, I got attacked my ship somehow got into a cave an died. Now the ship needs repair, the planet sucks, all of a sudden there is no iron. Plus Sentinels are hanging around. I tried killing them, but after downing the big one, and a regular one, the rest wouldn't take any damage no matter how long I hit them. It looks like it's game over. A BS loss. they are just killing me over and over and over. Total BS.

Never had a situation as bad as that. how did you get your ship into a cave? Nevermind.

I have never come across unkillable sentinels before. You shouldn`t need to kill the sentinels, just ignore them (don`t shoot any resources near them) and they should ignore you and pass them and fix your ship. Even if you do shoot anything near them just run and jump into your ship until they go away.

As for finding stuff, there is ALWAYS metal somewhere even if rare. Explore further afield, grabbing plutonium (those red spiky crystals) to keep your suit going. You`ll find some metal. Be patient as you go. Don`t get into any fights, grab the stuff and move on.

I've had sentinels in the terrain once but I just used grenades on them. If you run away from them, going into a building works best, then your wanted level will reset.

No Sentinels I couldn't kill yet.

I did have Emeril I could not mine though. It was the center column of an already weird formation.

Haven't noticed any sentinels that I haven't been able to destroy yet, which would have been a bummer when I was in a planet where they were on a hostile state.. Hopefully it will be a one time issue for you that won't happen again.

Only issue I've had so far is partial destruction of mining deposits (mainly Gold, not those crystal shaped ones). Those will just stay there and not being able to destroy at all, just a slight annoyance compared to the sentinel issue, though.

Have your ever been on a plant like this.
http://s44.photobucket.com/user/gt447ny/media/NMS%202016-08-18%2009-18-23-001_zpsj0tbg15o.jpg.html

They were all over me, there was no running away. i tried that they hunted me down, Well first they shot me down in my ship cause the cave BS I couldn't leave. then after re spawning they where right there. My ship was brokened down because they shot me down. I need iron to fix it and the resources weren't there (they couldn't be farmed for some reason). So I am in my ship they are shooting it there is absolutely nothing i could do. I logged. When I came back later, they were gone and I could get the stuff I need to fix the ship. From now on when I see "Sentinels Threatening" I will just get bact in my ship and leave. I died three times there.

I"ve had that yes.

You bring their HP to 0, they don't die and you can't kill them. Keep shooting, grenade, w/e, just can't kill them.

Also some plants/rocks, same issue. Can't mine.

Same planet. Tried save/quitting multiple times, didn't change anything.

That's exactly what happened. At least after being logged out for awhile I could get the iron I needed. If that didn't work, I guess I just lost, since the game would be log in die, log in die, log in die.

That sounds weird.
In the screenshot you show, there are heaps of the typical iron formations but you say you couldn't mine them? Sounds like a bug to me where your multitool stopped working for whatever reason (on both Sentinels and mining).

I've been on many planets with aggressive Sentinels and never had that issue (although, I am not sure I've been on one yet where the text was "threatening", I had "aggressive", "hostile" and "frenzied" but I didn't always read the description texts so who knows).

Also, how did you get your ship into a cave?!? I think I managed to get mine under a rock outcropping at some point (and I took damage when taking off) but I never managed to get into a cave. :)

Nope. No unkillable sentinels yet but I have had to totally restart because I decided to repair a crashed ship that was under an invisible and, apparently, extremely hard floating copper deposit. I made the mistake of hopping in the ship a 2nd time which overwrote my only good save.

Repaired the ship 3x times (no telling how long it took me to find all the minerals for that), spent 20-30 minutes looking for my old ship, and another 10 or 15 minutes shooting randomly into the sky hoping to mine out the invisible copper deposit with no luck.

Finally gave up and ditched 10-12 hours of game play.

Interesting. Planet doesn`t look any different from some I`ve visited. Neither have I visited a planet with outright hostile sentinels... yet.

I suppose with the amount of permutations in the game it`s possible that someone will sooner or later get into an impossible situation... Getting your ship stuck in a cave certainly didn`t help.

No sentinels, but I've had a couple of hostile animals that can't be killed.

The cave part was, there was a cave, it wasn't that close to my ship. Sentinels all over me, can't kill them, time to get out of Denver. Get in my ship blast off, screen gets all blocky, look like ground, the only thing I could figure is somehow I am in that cave. Which sucks, because sometimes when I am taking off to go to another place on the planet, I am in space. Like WTF I just just hit the engines how could I be in space. This time it must shot me into the cave. I couldn't back out, no maneuver worked. The whole episode had the feeling of "let's just kill him no matter what he does" to it.

I have come across a rare situation where space stations don't have npc's, I'm not sure if this is random or a bug. I have also come across a situation where your mining laser can't cut containers and you have to swap to your weapon. But in most normal situations you are able to use both as if there's very little difference between a mining laser and a weapon.

Once it felt like my weapon couldn't hurt the sentinel (perhaps I was missing my shots) so I switched mode to mining laser and it got him just fine.