Star Trek: Fleet Captains is designed for two or more players. It is set in the "Prime Universe" of STAR TREK (as seen in the various TV series and movies up to Star Trek: Nemesis) and is more adversarial in nature when compared to Star Trek: Expeditions.
Each player begins play with a fleet of ships and starts at opposite ends of an unexplored sector of space. This sector of space is represented by hexegonal cards (which are shuffled before play and placed face-down in a pre-determined pattern). As each ship progresses through the sector, you turn the tiles face up, revealing what is in that part of the sector (a Class-M planet, a Class-J Nebula, empty space, etc...). Hopefully you will discover and acquire resources while simultaneously denying them to your opponent(s).
When conflict inevitably breaks out, you and your opponent(s) will battle it out for sector supremacy. Last fleet standing wins the sector for their respective faction.
Each ship will be on a base with a dial and accompanied by a "Ship Card". The Card denotes three different statuses for each ship; normal operating, Yellow Alert, and Red Alert. Each status affects how your dial plays as well as how the game and your opponents interact with you.
There is also a deck of cards involved that each player brings with their fleet, and these are used during gameplay to affect the outcome of battles, player interactions, etc...