Serious Sam is a first person shooter for Windows PCs.
Serious Sam puts you in the shoes of Sam "Serious" Stone, the well-muscled protagonist who seems bent on ridding his world of an alien force headed by the overlord Mental whose primary aim is humanity's total annihilation. With sprawling outdoor areas just crawling with enemies and challenging bosses, Serious Sam will definitely keep you on your toes.
In addition, the game has some seriously bizarre weapons you can choose to fight with, making things even more interesting. If third person shooters aren't your thing, Serious Sam also has a first person shooter option, which is nice.
Hardcore gamers will note that the graphics aren't the best in this original version of the Serious Sam series. They're still a lot better that some of the earlier shooter games for PCs and the relentless action usually makes up for complaints related to game appearance though.
Serious Sam is an intense third person shooter game that fans of Doom and Quake will undoubtedly enjoy.