Alas, $50 is not an amount to casually drop on something I may like, nor even $20. I want to know more--the genre, the developer's track record, how stable it is, whether it performs well... by which point, I've accidentally learnt everything about the game anyway. Besides, most games operate in the same way, so it's unlikely I'd be surprised anyway. There are plot spoilers but video game plots are, by and large, to be ignored and avoided as much as possible lest your brain dribble out of your ears.
When video game surprises do come along, though, gosh it's lovely.