Complex sentence: The company first showed "Flight Unlimited III" at the "MicroWINGS" Conference in August 1998, where the game was revealed to take place in and around Seattle, because of fan requests and the varied landscape and weather of Puget Sound.
Split into simpler sentences: The company first showed "Flight Unlimited III" at the "MicroWINGS" Conference in August 1998. The game was revealed to take place in and around Seattle--a choice based on fan requests and the varied landscape and weather of Puget Sound.