how about Sid Meier's Civilization V: Game of the Year Edition steam key for TDU2?

Nuclear Dawn, Terraria, Deponia, Ravaged, Painkiller Black Edition, Cities in Motion, Victoria II?

PAYDAY™ The Heist

or BioShock® 2

or Left 4 Dead

or Company of Heroes: Tales of Valor (ROW)

or Fireburst

or Command & Conquer 3: Kane's Wrath

or Trine 2

or Ravaged

or Nuclear Dawn + Ignite

or BioShock

or Dungeon Defenders

or ORION: Dino Beatdown

All games tradable

I can add Dota 2 if need

Tomb Raider: Underworld?

Portal 2 gift?

The Club

Darksiders key or Homefront key

check
http://www.steamtrades.com/trade/WGbt3/h-games-w-gamespaypal

Bastion

Trapped Dead / Nation Red / Shadowgrounds Survivor

legend of grimrock

Painkiller HD for one (if you want another one :P)?

2 TF2 keys?

Mirrors edge?

gta vice city?

serious sam 3 for test drive

Ravaged?

Showdown + TD2U = sleeping dogs (key)