In Ace Combat 3: Electrosphere the player takes the place of an ace fighter pilot who works for an organization called "UPEO" and has to accomplish various missions, e.g. taking out a special aircraft carrier or taking out enemy satellite systems in orbit around earth. The player can earn ratings from A to D: the higher the rating, the higher the chance that the player can acquire new kinds of planes. The game has many environments which range from normal aerial missions to stratospheric missions and even outer space missions. A special catch is that the player often has to make decisions during missions which influence the overall storyline. There is also an autopilot feature which can be used to land or reach a destination.
The game was originally released in Japan on two discs. When the game finally got a western release, it was only on one disc and the game was now heavily edited. Changes include:
The 52 missions of the Japanese version have been reduced to 36 missions in the Western release
Removed story content and branching storylines of the Japanese version and became a more linear affair with the majority of the story content gutted in the Western version.
Since the branching storylines are missing, it also caused the multiple endings to be removed.