Advance wars: Days of Ruin [US] - £16.99 @ Movietyme

Advance Wars: Dark Conflict - NDS

Please note that this is the US version, but all DS games are multiregion, so it will work fine. FREE UK Delivery.

Blurb:
After a cataclysmic meteor strike exterminates 90% of the population, the survivors must battle barbarians, disease, and strongmen who seek only to secure their own power. Advance Wars has been reinvented. Set amidst a world in chaos and featuring new characters and settings, a gritty look, an engaging storyline, and online Wi-Fi battles and map trading. Try you hand with new COs and units, realistic graphics, and a new environment. Use Nintendo WiFi Connection and battle against a friend halfway across the world, or use the map editor to create, trade and battle on your own custom maps.

Metacritic Score: 85/100