World War Z developer Saber Interactive has dipped its toe into quite a few series, including Halo and Quake, and it looks like it also tried to add Half-Life to the list, asking Valve if it could remake Half-Life 2.
"After we did Halo Anniversary and Halo 2 Anniversary, as part of the Master Chief Collection, I reached out to Gabe Newell personally, because I knew him from a past life, and I said I want to remake Half-Life 2," Saber's CEO Matthew Karch told Game Watcher. "That's all I want to do. I won't charge you anything for it. I'll do it for rev-share and doesn't even need to be a big rev-share. I just really want to do because I love that game so much."
Newell declined the offer and told Karch that, in the event a Half-Life 2 remake was on the cards, it would be developed internally. That's not been Valve's position previously, with the first Half-Life getting the remake treatment, and even a Xen expansion, in the form of Black Mesa. The difference is that it started out as a mod, though the distinction has been blurred by it being sold on Steam Early Access.
While Newell's response isn't an indication that Valve has any plans to remake Half-Life 2, modders have made plenty of demos, Unreal recreations and even a Half-Life 2 remake for the original Half-Life.