Not quite as good as the Steam deal a few days ago but if you're looking for a hard copy then this is the cheapest I could find.
Don't forget QuidCo/TopCashBack!
# Metro 2033 is a gripping, atmospheric first-person shooter experience powered by cutting edge technology, featuring full DX10 and nVidia PhysX support for high-end gaming PCs, to deliver incredible visuals.
# Witness the everyday horrors of a broken society living in constant fear.
# Brave the darkness of the tunnels, where mutants hunt their prey and ghostly spirits lurk.
# Explore the desolate city-surface, trusting your gas mask and rifle to protect you from a poisoned world and the creatures that roam there.
# Steel your nerve and prepare to face the terrors that await.