A movie based on Valve's Half-Life and Portal games were being talked about from Gabe Newell and J.J. Abrams sine 2013. Ever since then, there haven't been any discussions about the video game adaptations. Many started to believe the films are dead and were never going to move into production at all.
J.J. Abrams has confirmed recently that both planned movies aren't dead at all. Both films now have writers attached, and the films are still a go.
Abrams spoke to IGN while promoting 10 Cloverfield Lane, a film directed by Dan Trachtenberg, who directed a live-action fan film Portal: No Escape, and made himself known. IGN asked if Abrams had anything to say regarding the two films and Abrams said:
“Not yet. But they’re in development, and we’ve got writers, and we’re working on both those stories. But nothing that would be exciting… an exciting update.”
All this confirms that the two films are still alive and are slowly progressing. Abrams saying that there was nothing exciting to update means that this film is on its earliest stages and won't be anywhere near pre-production.
Video game movies are getting greenlit more and more and these two films would be great coming to the big screen. Knowing that these two films are closely resembling the video games is an amazing update. To give a brief explanation of the two video games, both Portal and Half-Life are based in the same universe. Portal's Aperture Science and Half-Life's Black Mesa are both dangerous companies. It will be great to connect the two films making one huge universe. Referencing the other films via multiple cameos and and pictures obviously connecting both films would work perfectly.
Abrams producing both films means it's likely that the two moves could be released soon. The idea of 10 Cloverfield Lane being produced by J.J. Abrams was a major factor on getting the film made. Trachtenberg's latest film is receiving positive reviews from critics, which gives opportunities to make more films people would enjoy. There hasn't been a director announced for the two films, but after Trachtenberg's latest great effort, I won't be surprised if he's on the short list to direct at least one of the two films.
Both the Portal and Half-Life films do not have release dates at the moment.