Chaos Theory was linear with regard to level progression, but it gave the player the freedom to take multiple routes and approaches to each section. Really, it's a combination of the two that works really well.Yooz said:It's awesome in Splinter Cell. Just me on that one?
I say it depends on the game. Scarface: The World Is Yours was a good example of a sandbox game done well, while Devil May Cry 3 was what I would consider a very awesome linear action game. There were some side missions and such, but the game was pretty much completely linear from start to finish.
Good games are good games. No reason to pick one type of game style over the other. Instead, developers should decide what kind of game they want to make and THEN choose the method of progression that works the best for their project.