The major problem with closed-source and commercial games is not that they are closed source, at least not for me ... the problem with PUBLISHING.
They develop a game, sometimes even a very good game - but none knows about it.
They don't take the efforts to publish their games in the Linux communities.
And that's were we come - the Linux gaming news bringers.
We do their job for them, but sometimes it comes too late for them.
The free/open source games however publish their games, sometimes even every minor release because they want their developing team to grow by attracting more players to their games.
I cannot say for sure how many closed-source games have we missed because none knew about them.
But we are trying our best - I take them when they still young and in development