Well, if you're talking online combat-type games, then other than LC I would have to include Pirate Galaxy. They went through some major upheavals a few years ago, where the devs (Splitscreen Studios) split from their publishers (Gamigo), and lost many well-known and popular GM's and players in the process !!
I've not played PG for quite some time, but it was/still is (??) an excellent game with a lively community - and let's face it, flying spaceships through hyper-space and on planets, and fighting all kinds of nasties (including each other) has gotta be cool !!
EVE Online, another space combat game, but waaaay more complex than PG, and to my mind is it's downfall !!
Star Trek Online, I love the Trek universe as portrayed on tv/movies, but have only marginally played the game, and must admit I thought it would be better !!
Empire Universe, your colony ship lands on a barren planet and you must establish yourselves there - building homes and towns etc, mining resources and using them to create what you need - and taking care of your people to build a thriving community. When you can, you expand to other planets (preferably rich in resources you are short of) and establish new colonies. All good so far. Except, you're not the only colony in the universe, there are many many more, and they all have designs on your resources etc, and will fight to get at them !!
An interesting premise, and tbh an intriguing game too. Sadly a text-based game, rather than graphics, and so for the most part you must wait a while to see the outcome of developments, battles etc, which can be frustrating at times. Also it does leave the door open to bullying, where a large empire will literally pound you into submission, and you must join them as going it alone will leave your colony destroyed. But if you can take the heat, then by all means enter the kitchen !!
Grateful thanks to PupsiK for the awesome sigs !!