Frozen Synapse x any of these:
-A virus named Tom - card game
-AFTERFALL Insanity Ext.Ed. - card game-
-AVENCAST : RISE OF THE MAGE (x2)
-BURNOUT PARADISE : THE ULTIMATE BOX
-CRUSADER KINGS COMPLETE
-CRYSIS 2 : MAXIMUM EDITION-
-DEAD PIXELS
-DEAD SPACE
-DEAR ESTHER
-Eets Munchies
-Faerie Solitarie - gift - card game
-Fairy Bloom Freesia
-Fantasy Wars
-Fractal
-GLOWFISH
-GREED : BLACK BORDER
-GREED CORP
-HAMMERFIGHT
-Hydrophobia: Prophecy
-IGNITE
-LIMBO
-Mark of the Ninja (x2) - card game
-MIRROR'S EDGE
-MUSAIC BOX
-Naval War - Artic Circle
-Necrovision
-Necrovision : Lost company
-Organ Trail
-RED ORCHESTRA OSFRONT
-RED ORCHESTRA 2 - GOTY - card game
-Reign: Conflict of Nations
-SAIRA
-Satazius
-Serious Sam HD: The first encounter
-Serious Sam HD: The second encounter
-Space Pirates and Zombies (SPAZ) - card game
-Star Ruler
-Star Wolves 2
-The Showdown effect - card game
-Tower Wars - card game
-TRINE 2 (x3) - card game
-YUMSTERS 2-
frozen synapse = 2 keys,
left 4 dead 2 = 2 keys,
left 4 dead bundle (1+2) = 4 keys
add steam only when trading for keys, other offers here please