Depending on your choice of character, you will have to perform different tasks and pass through different levels. The authors decided to present the plot from three different points of view in order to make the game less monotonous and to prolong the playing time. Cisco will have to deal with rescuing and evacuation of the scientists from a science vessel, while Worf takes care of the pirates attacking the mother ship, and Kira will have to help her friend defend his stronghold from the fanatics of the opposing cult. All these events seem to have nothing in common, but as you advance through the game you'll see they form a coherent storyline. You will only get a clear picture of what has transpired when you complete all three campaigns.
Missions have interesting concepts.
Each one will end with a scripted sequence from the engine. The script is good enough to serve as a script for one of the future episodes. The locations are interesting and the game will give you a great experience you could never feel while just watching a TV episode. You will get to explore a crashed Federation vessel, USS Defiant, walk on Bejor, and of course, enjoy the interior of Deep Space 9 and its command bridge. The Fallen is actually an arcade adventure.