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Interested, in any combination of the following? Portal, Team Fortress, Day of Defeat, Day of Defeat Source, Half-Life, Half-Life Opposing Force, Half-Life Blue Shift, Half-Life 2, Deathmatch Classic, Half-Life Deathmatch, Ricochet.
I hope these great games interest you: Napoleon Total War, GRID, Day of Defeat source, Half life 1, Half life 2: Episode One, Two Worlds II, Cities Xl 2012 & Tropical Trilogy! (great simulations).
Counter Strike: Source, Portal 2
http://steamcommunity.com/profiles/76561198002190411
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