Clear Sky is definitely a love/hate game and the larger emphasis on all out action might even alienate fans of the first game. While I missed the lonely atmosphere that the first game had in droves this one still kept me hooked right to the end. It still has its fair share of annoyances but overall is a good game.
Gameplay: A lot more action oriented than the first game.
Graphics: Some very nice new effects bring the zone to life.
Sound: Good ambiance and decent voice overs