MarioDude78: I started to get into the Riddick Movie series recently, and wanted to take a look at Butcher Bay. Only to find that it wasn't on GOG anymore. Can anyone tell me what happened, and if it will ever be back or not.
The licensing rights allegedly expired and the publisher's right to sell the game along with it, so it was removed from all stores. The majority of video games that contain 3rd party licensed IP such as being based on movies, TV shows, etc. are generally licensed for 3/5/10 years or so and then the publisher loses the rights and the video game disappears from sale indefinitely in almost all cases.
There are exceptions of course, such as games that the publisher might have negotiated lifetime/unlimited rights to sell (rare I imagine), or if a publisher renegotiates the rights to a game because it is a big seller and they want to keep it on the market and it is worth it financially (very very unlikely for most such games). Another exception is where the publisher of the game is in fact also the 3rd party IP owner as well, such as Disney owning the Star Wars franchise and also the rights to all of the Star Wars video games. Such an IP is notable and a lot of money behind it so things like Star Wars games will probably be available forever in terms of the IP (but may not be available due to technical reasons such as not working on current systems, or other reasons).
At the end of the day though, in the majority of cases one can expect games based on movies, TV shows etc. to have a 5-10 year life span maximum and then vanish from the face of the planet unless they are some massive level of epicness like Star Wars or Star Trek or similar where the franchising spans many decades of moneymakingness far beyond what the average random movie can ever hope to achieve, or the profits for licensing rights perpetually or for long periods of time would ever hope to capitalize effectively to make it worthwhile.
TL;DR - The Riddick games are unlikely to ever be available anywhere ever again.