[H] 1 Key [W] A good game that's not Terraria.

Portal, Half-Life 2: Ep. One

Or if you also have a ToD or around 20 cards, I can do Left 4 Dead for 1.5 keys

interested, in : Deadlight, tropico 4 collectors bundle, sanctum 2, Legend of Grimrock, fez, bioshock 1, anomaly 2. Any of those of 1 key. (only tropico 4 is in gift format)

I have The Binding of Isaac Collection, Lilly Looking Through, Ms. Splosion Man, The Cat Lady, Defender's Quest: Valley of the Forgotten (GOG), The Darkness II, The Bureau: XCOM Declassified, BioShock