Trivia
Sam's red sneakers may be a reference to Sonic the Hedgehog - the speed power-up that pictures them with wings all but cinches it.
Serious Sam received 75% rating from PC Gamer magazine (June 2001; reviewed by Jeremy Williams).
Contributed by
PCGamer77 
(3025) on Mar 06, 2005.
Serious Sam was THE first game to implement ATI's TrueForm graphics technology.
Contributed by
NeoMoose (1114) on Oct 26, 2001.
Serious Sam: The First Encounter is the first part of a 3 episode adventure. If everything goes well for Croteam, two other games using the Serious engine are planned to be released, called quite originally Serious Sam: The Second Encounter and Serious Sam: The Last Encounter
Contributed by
Cochonou (1021) on Oct 10, 2001.
Final level music (before boss) is a strange heavy metal remix of the famous Phantom of the Opera opening theme.
Some of the most famous Serious Sam players (who even appear in the game's credits!!) got the complete game only several months after its release, and constantly played the same demo level while others had the full version.
The first Serious Sam demo was a technology demo for the Serious Engine by Croteam, not a demo for a game in particular. The folks at the Old Man Murray website praised the game so much that eventually the guys at the Gathering of Developers got wind of it and sponsored a complete, full game based around the demo.
