Doom Dr Scifi

Doom Dr Scifi is an online 3D game and 100% of 2 players like the game. It is reported that human were invaded by slime aliens now. As the only one who knows about the weakness of aliens, you need to take your weapon and defend human civilization at all costs! As a hardcore first person shooting simulation game, you have no choice but to aim and shoot as faster as you can with no mercy!
How To Play Doom Dr Scifi: mouse interaction.