Hello!
You can get S.T.A.L.K.E.R.: Clear Sky for as little as £0.05 via a key-selling website called Gamivo.
This deal is for the GOG version of the game.
Instructions:
-
Go here: https://www.gamivo.com/product/s-t-a-l-k-e-r-clear-sky.
-
Scroll down to the “Offers” header on the page.
-
Choose the cheapest offer and click “buy now”.
-
Go to checkout.
Untick the “Customer Protection program” checkbox.
Confirm you do not want this by clicking the conveniently hard-to-see grey link in the pop-up. -
Add the following discount code:
CLEAR-GAMIVO
Once purchased, you can redeem your ultra cheap GOG key here: https://www.gog.com/redeem.
Note: Sometimes if the price in the Offers section is low enough, you may even be able to get the game for free with the discount code!
Tip: Check that you do not already own the game on GOG before spending your pennies.
Enjoy.