[H] Natural Selection 2 and some more games [W] Games, keys/cards or M&B WARBAND

These are the games:

Natural Selection 2 (Steam Key)

War of the Roses: Kingmaker(Steam Key)

Trine 2: Complete Story (Steam Key)

Roaming Fortress (Desura key)

Reflex (Desura Key) and Eryi's Action (Desura Key)

and a Batman Origins DLC; The Millennium Skins Pack for Batman™: Arkham Origins

And these are the games that I own already; http://steamcommunity.com/id/woofery/games/