Free Mystery PC Game Available On GMG For A Limited Time [UPDATE: OUT OF STOCK]

[UPDATE] This deal has now ended, as the Free Birthday Game is listed as "out of stock."

The original story is below.

The digital games store Green Man Gaming is giving all customers a free PC game to celebrate the seven-year anniversary of its launch.

The free game varies from person to person, but they appear to be all indie titles, with many people tweeting out that they got the game Three Dead Zed. Other people received Huntsman: The Orphanage, Corporate Lifestyle Simulator, Reverse Crawl, and Spin Rush, to name just a few.

The free birthday offer is listed here and costs $5, but can be redeemed for free by using the promo code FREEGIFT at checkout.

GMG is known for its surprise discounts. Also to celebrate its birthday, the site is offering 50% off the Game of the Year Edition of Middle-earth: Shadow of Mordor for $10 until tomorrow. A new deal will be revealed then, and another each day for the next five days.

You can get an additional 20% off that same game by using the promo code 7YEARS at checkout.

GMG sells games digitally in 190 countries, and last year, it began selling PlayStation 4 games in addition to PC, PS3, and Nintendo 3DS titles.