7-10 + Tactics were all great, or at least I felt that way when they came out. I haven't played through 7 or 8 in a long time, maybe it's different now.
4-6 are okay. certainly playable.
I have no interest in 1-3.
Everything after 10 not so good. They hit their high point about a decade ago.
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http://www.youtube.com/watch?v=npHDxSvwCE0