Blood II: The Chosen is a sequel to a popular game in the 90's, named Blood. It wasn't as popular as it's prequel so it's a bit hard to find, so I thought I'd share. Those who enjoyed games like Quake, Shogo, Half-life, and Unreal Tournament may find this fun.
Info from wikipedia:http://www.gamefront.com/files/23326557/Blood+2+w.Nightmares.zip
Once you download the .zip, just extract the GAME folder anywhere and run Blood2.exe and it should start up. Mods (once you find them online, none are included in this package) are as easy as putting them in the "CUSTOM" folder.
Let me know if the links die or if you have any other issues/questions, I'll reply asap.