There's a lot to take in here, but let's look at some highlights. In terms of modern games, Tomb Raider (£3.75), Deus Ex: HR Director's Cut (£3.25) and Quantum Conundrum (ridiculously cheap) are both worth checking out if you haven't already, but personally speaking this is a great time to stock up on some classics you missed.
Startopia for £1? Final Fantasy III for a fiver? Anachronox at £1.25? Deus Ex: The Best Game Ever for £1.25? Go on then. Thanks and credit to bandwidthbob @ HUKD!