...and I am one. Well, not obsessed, but I do watch, like, and know about the series and characters. Look, I DON'T dress up and go to conventions, ok?! ;)
Anyway, onto the game itself: not a bad game, but "Tactical" is slightly misleading coz it's more a shoot-em-up. And to be honest, this game doesn't even have to have a Star Trek license. It's not uniquely "Star Trek" enough - strip out the Star Trek references and insert another (made up or another license) and gameplay will still be the same.
But at this price, DEFINITELY not a bad game.
Story is set only during Captain Kirk's era. You don't play any of the famous characters (Picard, Janeway, Sisko, Archer etc) because of this - not even Kirk and friends. Only an unfamiliar cast.
And you never leave your ship. It's all set in space, you only controling the ship, weaving amongst planets, asteroids, or Star Bases. You see them on the ship's monitor, but you can't visit them!
You can play either Federation or Klingon, so there's two different stories. Within each story, there are multiple choice answers, which does affect gameplay, but only in so far as battles ie choosing one answer may make you a friend; choosing another answer can lead you into (sometimes tougher) battle. And depending on the answer, the game awards you points which are spent upgrading your ship.
There are no differences in upgrading your Federation or Klingon ship: the names might be different (eg Phaser/Disruptor), but effectively it does exactly the same thing ie quicker turning, faster warp drives, phasers/disruptors charge up quicker, etc. As you progress through the game, you're awarded different classes of ship, the upgrades follow you to the new ship.
Upon completing the game, when you play Skirmish Mode, not only do you play the ships you've been awarded (including the upgrades), but you can play as three other races - though strangely, regardless of race or ship class, all the ship dashboards are exactly the same (Romulan)! I haven't played Skirmish against another human, but you can play different scenarios (eg Fed v Fed, Fed v Klingon+Romulan, Orion+Klingon v Fed+Romulan, etc) and all at various ship classes too. Quite fun trying them out.
Graphics are nothing spectacular (smoke and explosions are nice), sound is good ie authentic, and music is very good - nice and orchestral and even film-like.
I found it enjoyable enough whilst it lasted. Let me put it like this: I'm 37 and these days I don't get to play as many games as I used to or like to - but it was engaging enough for me to play both stories til the end, then tinkered with the Skirmish games for a little while.
Multi-player wi-fi may add another whole star to my score, but I really cannot comment...