What do you think games would be like if Half Life was never invented, if the source engine never came?
It seems as though Valve are very respected for there source engine and was wondering what kinda games/gameplay we would be stuck with if Valve never was around.
I was also wondering if they inspired other game developers to go further?
Then Doom 3 would’ve been the leading example.
And gaming would suck. Immensely.
Yeah, it would be bad. I feared this. 
but it’s here after all, why should we think about “what if…without HL”.
Just came into my mind 
Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.