The Hut are selling "Lunar Knights" for the Nintendo DS for £12.93 (inc Del.)
You can get cashback through the usual sites (e.g. 5% Quidco, making it just £12.28)
The next best price seems to be £14.99 from Gameplay.
Descend into the gothic world of Lunar Knights!
- Play as two different heroes with unique powers and weapons.
- Dynamic weather and day night cycle that affects gameplay.
- Expansive 3D shooting stages test your skills with the Nintendo DS stylus.