Klei's masterful sidescrolling stealth 'em up Mark Of The Ninja is now available on Steam for £11.99.
"Mark of the Ninja is an utter triumph," Matt gushed in our 9/10 review. "Not content with just pulling off a 2D stealth game, Klei have struck the perfect balance between accessibility and depth, crafting a fantastically engrossing title that provides splendid satisfaction through gameplay. Pure shadowy bliss."
So you should probably buy it then. Note that the 1200 Microsoft Points XBLA version is slightly cheaper, though.