bler144: Ah well. It was fun to try.
In the end I tried to answer to everything (except 9, I really don't have any idea about that). Still I don't know most of the games and this crossword don't complete itself when you know some games title.
I think the main problem is that if you know all games in the crossword you already own doom and doom 2 (and still, I know number 1... I played it, but I still got it by luck... I really don't know why "Duck and cover").
And many games are really too niche... Why don't put something like Baldur's Gate, Deus Ex etc... that are immortal classic that everybody know (at least on gog)?
Yes, it's a giveaway, it's free, I know... but doom 1-2 are really cheap, and this is more difficult than any other giveaway.