Nikki Elise was playing Dota 2 when a man with a hand gun appeared behind her and started rummaging around in her gaming equipment.
The gamer known as Sajeden streams her playing games to her many friends and fans - one of whom spotted the intruder and immediately called the police.
Gamers from around the world watched in horror as armed men entered her home and robbed the 28-year-old, but thanks to their quick action, were able to contact authorities.
One of the officers on the scene confirmed that one man was still in the apartment when officers arrived. He fled, but was taken into custody after a short pursuit by police.
The other suspect is still at large, and could be carrying a handgun, warned police.
Neither Nikki nor her roommate were injured in the raid, though Nikki will not doubt be thankful that she had her webcam switched on at that particular moment in time.