Not the best, but not the worse. Will not disappoint unless you had really high hopes for it.
The game mainly plays through an outside view of the ship, but has a flat 2D tactical map to help you control all your ships and see the whole "battlefield".
This game is not perfect but it will not disappoint the Trek fan. For a non trek fan, this is like a more linear mission based " X3" or "Dark star one".
Graphics: The graphics are very detailed for the ships and the developers put a lot of effort into the ships. At high resolutions, you can read the names of the ships, even when they are not right next to you. However this cannot be said for the rest. While the ships are detailed, all other graphics are pretty "standard". The drydocks at close up looks flat and the galaxy is nowhere near the beauty of say "X3". However it is acceptable.
Sound: The sound is OK, and the "main" actors give quite a good performance. However the sub characters such as "Rick" of the Coto does sound a bit dump and overacted. The musical score is very Trek like and has a good orchestral atmosphere but not memorable. The sound effects are also clear and OK.
Controls: The controls really need a lot to be desired. Star Trek Bridge commander offered a clear and concise way of controlling your ships. Legacy does not have that. It would seem a lot of emphasis was put into a design compatible with consoles, at the expense of the PC. Using a single key for multiple purposes may work for a game pad but not for a PC. e.g. F to move the ship in the general direction of the view, and HOLDING down F for a list of functions such as scanning, transport etc. What is worse is you cannot remap the keys. I think the controls are the worst part of the game.
Gameplay: As with the controls, there seem to be something wrong with the gameplay. It may be to do with the interface, but I just cannot put my finger on it. The battle screen seems to work, but at the same time confusing. The damage is just like a health bar etc. However, having said this, the objectives are clearly accessible and when in combat which ship you have selected and what target it is aiming for is pretty clear. Warping is simple and most common tasks are easy to perform.
Story: I cannot say much as I have not completed the game. However, from what I have seen, it is a typical Star Trek story. Mystery, suspense, not just good and bad guys, but a few different aliens all with unrevealed agendas. It is nothing special, but interesting enough to keep you playing.
Multiplayer: Not player, not tried it yet.