I see if a game is worth buying so I can support developers that make good games instead of supporting devs that make crap games as games in Australia are pretty expensive compared to the US and Japan. If it wasn't for copies, I would have wasted a LOT of money on crap games! Many games don't have demos and if you cant rent/borrow it, you need to rely on reviews but even if sites give great scores to a game, that doesn't mean YOU will like it - everyone has different opinions.