Serious Sam creator Croteam has released the game’s engine for free to celebrate the franchise’s 15th anniversary.
Serious Sam: The First Encounter was launched in 2001 and built on V1.10 of the self-titled Serious Engine.
Its successor, 2002’s Serious Sam: The Second Encounter, was also built on the tech.
“Historically, this version of Serious Engine is very important for Croteam and for me personally,” Croteam's Vyacheslav Nikitenko said in the announcement.
“I created several mods for Serious Sam back in the day, before even starting the work on the source code, and it was a great tool for learning.
“And it’s even better today! Obviously, Serious Engine v1.10 won’t produce top-notch graphics, but the source code is very well commented, easy to modify, and there are lots of user generated mods out there. This version has everything you need to build your own game – or just experiment.”
You can get the engine from GitHub.