At the research base of earthlings, a portal opened from which monsters appeared. You in the game The Portal will help your character fight them. Before you on the screen you will see your hero armed with a blaster. He will be located in one of the premises of the base. Using the control keys, you will force him to move forward. Look around carefully. As soon as you notice the enemy, aim your weapon at him and, having caught in the sight, open fire to kill. By shooting accurately, you will destroy the enemy and get points for it. Also try to explore all the rooms in which you happen to visit. Somewhere in them there may be caches in which weapons, ammunition and first-aid kits are hidden.