With one of the research bases located on a distant planet lost connection. Urgently there was sent a detachment of soldiers and you in the game Portal of Doom: Undead Rising will be in it. Coming out of the portal, you should immediately take up arms and turn on the flashlight and start moving along the corridors. You will come across dead bodies and you will have to search them. You may come across various items and ammunition that may be useful to you. From the darkness, various monsters will attack you. You will need to fire at them from your weapon and kill them.