Thanks to Evgeni's comment I left the planet, loved the chicken ate the relic twist. After bruteforcing through most doors by various ways (going through walls and/or saving and reloading which sometimes allow to go through a door or allow the puzzle to work again) the game was very fun play, with a catchy plot, perfect movement inside great looking environments and satisfying gunplay and rise in power via levels and equipment, eventually ridiculing the aliens which were previously a threat.