I've been playing outer space combat sims since the original X-Wing came out in 1993.  Tachyon is just as fun and I must say the graphics are WAY better! ;)  I'm using a GeForce2 on a PIII 500 with the game's graphics settings maxed out.  It runs perfectly.  It's an older game but I could never run it cause I didn't have a nice enuf system.  It reminds me a lot of Privateer 2 but I think it's better.  Definitely check this one out.  Can't beat the price and you get MORE than what you pay for this game!!