Green Man Gaming is an authorised reseller selling activation keys for Steam and other platforms. Because it is authorised rather than a grey-market marketplace, keys are legitimate and region information is disclosed before purchase — which is the difference that matters when comparing it to cheaper key sites.

This is where percentage codes genuinely exist in gaming. Codes here apply on top of an already discounted key price, and the combined discount frequently beats the same title's price during a first-party sale.

Two things to check before buying. Region locks are listed on the product page and a locked key will not activate outside its region. And refunds on keys are far more restricted than on Steam — once a key is revealed, most sales are final.

1. Check the region information on the product page before adding to the cart.
2. Click Get code and add the title in the Green Man Gaming tab.
3. Paste the code into the Voucher code field at checkout.
4. Redeem the key on the listed platform — keys are usually non-refundable once revealed.