Is there a free game or one that isn't way expensive that is similar to FTL?

I like the idea and concept, but the ending is the same every time, you win or you don't. I tried getting Star Command 2, but it said it was too old of a version to run on my computer. I have windows 8. Does anyone know a game similar to FTL that is bigger and maybe has the ability to control a fleet of ships a criteria is met? It can be naval I guess, but space ships seem to just control that market.

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