It doesn't have to be a lot, though. After all, Valve was hacked like an year (sorry but it's been literally 20 yeas) before HL2 was released and yes, some Quak

It doesn't have to be a lot, though. After all, Valve was hacked like an year (sorry but it's been literally 20 yeas) before HL2 was released and yes, some Quake code was identified immediately.