The Collaborative International Dictionary of English v.0.48:

Gameness \Game"ness\ (g[=a]m"n[e^]s), n.
   Endurance; pluck.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gameness
    n 1: disability of walking due to crippling of the legs or feet
         [syn: lameness, limping, gimp, gimpiness,
         gameness, claudication]