"If you read my review of [game x], you'll know..."
If you want to compare the game you're reviewing to another, that's fair enough. Comparison with something familiar is an effective way of explaining concepts, advice on which version of a game to buy is always useful, changes for better or worse in a sequel are good to read about. But fit those comparisons into the review in question - mentioning that you've written about it elsewhere is just annoying.
--- "I must vanquish evil that isn't personally convenient!"
I dunno, just something about starting the review with "aah" makes the reviewer look like some grandparent reviewing a game to the grandkid on his knees. It just infuriates me. --- Borderline Troll http://home.exetel.com.au/jerec/royale.htm