Dvd.co.uk are selling "Rainbow Islands Revolution" for the Sony PSP for £7.99 (inc Del.)
You can get cashback through the usual sites (e.g. 4% Quidco, making it just £7.67)
The next best price seems to be £9.99 from Play.
Rainbow Islands Evolution brings you a fresh take on a classic 1980's video game designed exclusively for Sony PSP.
Retaining the original gameplay but delivering enhancements to use the abilities of the PSP to the full, Rainbow Islands Evolution is 21st Century retro video gaming at its very best!
An all-new storyline brings a musical theme to the world of Rainbow Islands.
Brand new modernised 3D graphics, style and game features.
Move between three tiered planes in order to reach the top of the island.
Ten new islands to explore each with its own boss character.
Multiplayer, Normal and Expert Modes.