If you're of that age where you watched Tron on the big screen and marvelled at the visual style, then you've come to the right place.
Of all the Tron-related games and sequel movies (and I include Tron 2.0 in this!), I think this game comes the closest to replicating the "feel" of the world of the first Tron movie. The only thing missing are the discs and the clank-clank as you walk around (which Tron 2.0 got so so right for me)..
So, what is Tank Universal? Well, it's a Tron-homage-labour-of-love. It's clearly an indie game. The lack of voice-overs, and very simplistic animation marks it out as a small-team (one man?) effort. Also, the story is very similar to Tron (Bad Guy taking over the system, User logs in to kick ♥♥♥, and all other programs are amazed at how the User has more skills and powers)...
Tank Universal packs so much in. There's a little bit of wandering-around on foot, and a lot of time spent in a tank. While in the tank, you can traverse mazes, explore the beautiful world they created, play domination, and so on. Everything under the 'umbrella' of being a good dude fighting in a world of bad dudes, and needing to travel around it to stay ahead of the 'bad dudes', while getting closer to the 'big bad dude' for the final fight... There's really quite a lot of variety, and stuff isn't repeated to death, like they would be in a AAA game, where they have to milk every last cent out of an expensive asset (for example).
I was impressed by pretty much everything in this game. The ship/tank models are lush. The world design is stunning. The sounds/music are very very close to Tron, and the visuals are 100% spot-on (They even replicate the irregular 'flashing' of the poor rotoscoping in the movie by pulsing the brightness.. So ingenous..)..
Is there anything which makes me unhappy? That the game ended. Playing domination was great fun (I was playing in easy mode, which may explain it).
So, if you love Tron, and want to play a tron-like classic good vs. evil game, and aren't too hung up over spoken voiceovers, or FMV, then this game is for you!.