Fuck up HL2 all you want, JUST DON'T TOUCH THE ORIGINAL!!!!
My favourite FPS games have been ones with lone protagonists against alien or demonic invasions on isolated research bases, which is basically Doom and Half-Life 1! These are the only PC games I play, and I don't like sequels like HL2 or Doom Eternal.
As for this movie, you can feature HL2's crap all you want, but if you diss the CLASSIC that is the original HL1, then I'll be baying for your BLOOD!!