Hi,
sadly, I can't continue the game although I am close to finish in the alien level. One door won't open because the key card does not work, I watched a few Let's Plays and it is supposed to but somehow nothing happens. I attach a screenshot, can you confirm or not? I restarted the game, same problem.

I was around the same point and thought I was stuck, but I had picked up 2 keys at that point and was just using the wrong one. See if you have a different key in your inventory, or search around for another key. I assume it was the key dropped by the aliens you had just killed, but there is another key up the elevator.

Wow, you are amazing :) I had another card in the inventory from before the last save point. That did the trick. Thanks a bunch!

No problem!

Hi, were you able to proceed and jump on top of the ledge on the next screen? Here is s screenshot. For some reason, I can't jump on top of the ledge. I'm stuck here and can't progress. It must be a random bug or something.
edit. nvrmd. i got through it.