hola, tengo una key de DEAD ISLAND extra para steam,

http://store.steampowered.com/app/91310/
[img=http://cdn.steampowered.com/v/gfx/apps/91310/header.jpg?t=1311386483]

la puedo intercambiar por PORTAL 2 o LEFT 4 DEAD 2 (solo KEYS activables en STEAM)

http://store.steampowered.com/app/550/?snr=1_4_4__13
[img=http://cdn.steampowered.com/v/gfx/apps/550/header_292x136.jpg?t=1311182089]

http://store.steampowered.com/app/620/
[img=http://cdn.steampowered.com/v/gfx/apps/620/header_292x136.jpg?t=1312396173]