I haven't played the first, or second one in the series, and as the third is coming out on my birthday, I thought about getting it for myself as a gift. I know Human Revolution is a prequel to the first two, but are there any big reveals it may spoil for me in the later games (without telling me what they are, of course)? I'll be buying the first two (or at least the first) game either way, but HR just looks to fucking awesome to wait.