In the year 2000, a small independent developer called Croteam wanted to showcase their new engine called the Serious Engine. The game ended up being called Serious Sam: The First Encounter and it became much more than just a technical demo for their new engine. Five years later they followed it up with Serious Sam: The Second Encounter and now in 2010, Serious Sam HD. Serious Sam HD is built upon their Serious Engine 3 technology and it shows but will gameplay from such ancient times still be relevant today? Find out when Jeff Markiewicz of Gametactics reviews Serious Sam HD for the Xbox 360 Live Arcade.