Splinter Cell Blacklist comes out in 15 days. Ubisoft has continued to tease fans with gameplay footage and plot details, and its latest Threat trailer raises even more questions. Who are the Engineers? What is the significance of their Blacklist? See for yourself below.

The trailer also reminds people of the bonus content included with Blacklist pre-orders, which includes the Dead Coast map, a body suit, and gold-lensed night-vision goggles. Splinter Cell Blacklist releases on August 20 for Xbox 360, PlayStation 3, Wii U, and PC. 

If you want more Blacklist news, check out Kyle's exploration of the game's different modes here