We have seen, DOTA, TF, Half Life, and Portal as well as all their sequels. Sure valve makes money through steam but how long can valve as a company stay relevant before they need to rely purely on steam (Which many people are finding alternatives to by now anyways) to make money? Valve needs to release a new game eventually or they will likely start losing money. How much longer can they wait until steam and the TF2 and DOTA shops stop making them income? (please no stupid HL3 jokes i would like to hear honest opinions)