HMV are selling "Hamsterz 2" for the Nintendo DS for £12.99 (inc Del.)
You can get cashback through the usual sites (e.g. 5% Quidco, making it just £12.34)
The next best price seems to be £14.99 from Gameplay.
Because there's no such thing as too much cute!
Care for up to 12 hamsters including tow unlockable rare breeds.
Customise three cages by collecting over 200 toys and accessories, plus 34 'treasure' items.
Play fun mini-games and earn points to buy cute outfits for your hamster.
Use DS Wireless Communications and compare your friend's hamsters with your own.