Take AoE2+Forgetten Expansion + Contagion + Risk Of Rain + Skulls Of Shogun + Bit.Trip Runner all for 7 TF2 Keys or $14 usd paypal (You pay fees if any)
If you want, you can sub out one of the games for one of the following: Bit.Trip Fate, Super Hexagon, Dead Pixels, Toki Tori, Rush, Pixeljunk...