The Hut are selling "Dungeon Siege: Throne Of Agony" for the Sony PSP for £7.93 (inc Del.)
You can get cashback through the usual sites (e.g. 5% Quidco, making it just £7.53).
The next best price seems to be £10.97 from Tesco Jersey.
Silenced beneath the sea for a millennium, the vengeful screams of Malith the Betrayer have been unleashed. Create your hero and bring final justice to the Throne of Agony.
Face over 100 monsters; familiar Dungeon Siege favourites and many all-new creatures.
An all-new adventure developed exclusively for the PSP (Playstation Portable).
Wireless co-operative campaign - experience the full Dungeon Siege adventure with a friend at your side.