I am generally very very wary of films made after games, they usually give their game namesakes a bad rep.
Doom 1, 2 and 3 = Awesome.
Doom Film = [censored].
Aliens Vs Predator 1,2 = Awesome.
AvP = OK
AvP II = ''Sorry Joe, I won't be able to go see that film with you, because... erm.. on Friday night I will be at my little brother's funeral.... walks away, cocks gun, shoots little brother''
Yeah just to add a few in my opinion: http://en.wikipedia.org/wiki/List_of_films_based_on_video_games ...here you have a better view of failures in movie adaptations from games.
There are some exceptions for me like: Resident Evil 1/Dead Space Downfall/Hitman - directors cut...and Doom isn't so bad when you see all the others...like Max Payne playing Constantine on Blue Mescalin...
The movie should start from Fallout 1...because we want to see some sequels...right.... not only Fallout 3...
Movie can be directed in my opinion only by the Directors ...Paul Verhoeven or James Cameron ... also Peter Jackson - currently trying to move the project Halo (it looks like a great movie...),
With any other director I think that will turn out to be bad...also some part is in studio...because they usually destroy some movies with reediting...but luckily now you have DVD-s with Directors cut...like Payback - totally different movie.....just imagine Warner Bros studio shooting Fallout with the PG for kids (they are trying to do this with Terminator - Salvation...so it will be a total ................)