On the second level if you have the autoshotgun from a previous secret you can completely skip the fight where you pick up the autoshotgun by picking up all the ammo first.

Thank you for your pointing that out. Now that fight gets triggered separately.

In Container Constructions, after getting to the ledge where you get to the secret devastator, you'll get stuck if you get to the area again. Also, in the same wide area, after crossing the second bridge, you can to to an isolated corner via small ledge. And then you get stuck. I thought there was a secret.

I see, I know what part you mean. Might be able to add something there. Also didnt know you could get back to the devastator area