Okay, I was searching on you tube for a few cool source mods, and I noticed GE:S, and it seemed like heaven since one of my favorite games of all time is on one of my favorite engines of all time! One problem: I don't own HL2, and I noticed that some other HL2 mods are compatible with other source games such as TF2, CS:S, and DoD:S, which I have! I was simply wondering if GE:E was compatible with multiple source games like a few other HL2 mods.(mods including insurgency or zombie panic source) And if GE:S isn't compatible with CS:S or TF2 or something, do you think you would be able to make GE:S compatible with any other source games?