PlayDevil has posted a very interesting interview with CEO 'Tero Virtala' of RedLynx regarding their very succesful XBLA game "Trials HD".
Here's a snip:
"3. What was the inspiration to set the game in a deserted warehouse? Was there ever a thought to also include outside levels?
As with every game we make, with Trials HD we wanted to focus on making the core game as good as possible. In Trials HD, it's he combination of simple control mechanics and highly developed physics model, linked with the aim of trying to pass the tracks / proceed as far as possible in these tracks. And then around that, build features that fit with this core-play the best."