Hey fellas,
I just started playing this UFO Defense game for the first time... it's awesome.
I wanted to know something and I guess this is the place to ask.
How many of those alien artifacts do I need to keep? I see I can sell them for a good chunk of change. I could use the cash but I don't want to limit my ability to conduct the research on the artifacts. Is one of each enough, or should I keep more?
Thanks. Andrew
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