Free games: Get Serious Sam: The First Encounter on GOG free until August 26

Sure, it's a bit of a bummer that Serious Sam 4 has been delayed until September. We were all looking forward to blowing up headless extra dimensional monsters with a shotgun, just like any red-blooded PC gamer should be. Fortunately, GOG is offering Serious Sam: The First Encounter as a free game giveaway now, and the offer is good for 48 hours.
Serious Sam: The First Encounter is actually the first half of the first Serious Sam FPS game, and it provides an introduction to Sam 'Serious' Stone and his time-traveling quest to ventilate as many headless, earth destroying mutants as possible. Honestly? There's not a whole lot to know: monsters have invaded our universe, Sam is really good at fighting them, and some Earth scientists send him back in time to use a relic called the 'Time Lock' to ban them from our version of reality, permanently.
That's pretext enough to send Sam - that is, you - into a series of absurd faceoffs with gangs of ridiculous beasts, many of whom do not have heads, but all of whom are bent on your personal destruction.