The Humble Store is currently providing PC gamers with a free copy of 4A Games' atmospheric first-person shooter Metro 2033.
If you head over to the store's main page, you can secure yourself a copy right now. The Humble Store is celebrating its first birthday this weekend, so there are plenty of other great deals being offered in honor of this momentous occasion. I suggest you check out the store and take advantage of the savings now before all the deals expire.
We were quite smitten with Metro 2033 when it launched back in 2010. You can read our review of the title right here.