What region are you in? All the keys shouldn't be region locked unless they say otherwise. When I look at the reward page it says it's global, so it should work.
try to redeem it
in 3 steps
Choose the game that interests you and play itfor free.
Every game has some quests for which you will receive Soul Gems.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
You know that on Gamehag you can get real rewards for free, right? Join us, complete walkthrough and get your chest!
Has anyone got Fallout 3 for SG here? https://gamehag.com/shop/fallout-3-goty I want to play it but I don't know why this game is not available on steam to purchase in my region. But if I redeem the key, will it work?