Harbinger is a SciFi themed adventure map set on a Lunar base under attack by aliens, and a computer virus. Your ship is ambushed, and you're forced to abandon it. After crash-landing on the moon's surface, work your way through the desolate base in an attempt to contact Earth and warn them of the pending attack. You will need to solve puzzles, fight waves of enemies, and parkour your way to victory. Keep an eye out for secret areas! There are also achievements you can unlock throughout your journey. Both will help boost your score at the very end!