Underhell is unique, it's one of the first very serious SMOD games. Before I get onto the main game, I'll tell you about SMOD. Smod started out as a small mod for HL2 back in 2006 or so. It's an abbreviation for "Super-Mod". It was made by a person call the_author, who is Japanese. He has disappeared, but his mod is still going strong. It's HIGHLY customizable with custom weapons, script, and many other things. You can make it as wacky as you want, or an ultra-realistic action packed shooter. On…