[H]√Letter, Starcrawlers, Medieval Kingdom Wars and others [W] Offers / Black Mesa /Umbrella + DLC

I have this games to trade or sell (all of them are steam keys):
Starcrawlers (Steam Key): http://store.steampowered.com/app/318970/StarCrawlers/
Medieval Kingdom Wars (SOLD)
King of the World (Steam Key): http://store.steampowered.com/app/615020/King_of_the_World/
Stardrift Nomads (Steam Key): http://store.steampowered.com/app/381250/Stardrift_Nomads/
Quantum Wizard (Steam Key): http://store.steampowered.com/app/660980/Quantum_Wizard/
√Letter - Root Letter - (Steam Key): http://store.steampowered.com/app/543240/Letter__Root_Letter/