Stop being so cheap.
While you are paying 6.50-8.00$ for a 1.5h movie ticket, and 18.00-23.00$ for a DVD.
i dont see why it's so hard for you to pay 16-20 bucks for good quality (yet short) adventure game?
5 hours is not such a short game assuming it's not too easy, and youre not usung the walktrough.