What? Never heard of Natural Selection?! It's a halflife mod available free if you got HL, CS, etc. at http://unknownworlds.com/ A little background: It's a combition of First person shooter (FPS) and real time strategy (RTS) games! It's marines vs Aliens, two gaming modes. Combat resembles CS style, while NS mode requires both team communication, teamwork, strategy, and superb aim, and skills. There is a large learning curve to this game, I agree. If you're interested, download it and try out combat mode first. WE CAN TEACH YOU. Our clan (SUX) participates in CAL-NS and we're looking for talented members. If not, we can train and teach you. Our website is suxclan.cjb.net. Hope you'll consider this game! It's truly amazing.