Portal generator and distant wrecks

[GRM1]

Hello, after building the portal generator I have a few questions that came to mind:
- what does the level of rarity and difficulty correspond to? because it is not clear.
- why do I find several distant wrecks but with closed doors and no way to enter the wrecks, when there are sometimes several in the same portal?

If you have any answers, I look forward to receiving your answers!
thank you

[Phoenix Cat]

The higher the rarity the better the loot, The higher the difficulty the better the loot. Once your used to them it's easy to run 5/5's. I do all the time. There is only a guarantee of at least one wreck per portal. The rest might not accessible.

[ffets]

There are one or two wrecks in each biome you reach. I never found a completely closed one so far. The difficulty is also the number of safes, you'll find in the locked vault room. Alos, you need difficulty minus two keycards to ulock it. So difficulty 1 and 2 need no cards for the treasure room, difficulty 3 needs 1 card, etc. There's also a fusion reactor in each wreck, which can be activated by a single fusion energy cell. This shuts on the lights and opens some airlocks with safes hidden behind them.

[EastFacingRaven]

I have never found a wreck I could not access. But sometimes finding that access can be tricky. Try to find a way to get on top of the wreck and look around from there. Entry is sometimes pretty high up.

[mart4ofus]

Some fun wrecks are when they are partially flooded. You walk down a set of stairs and suddenly you are in water, no warning either. So fun.