S.T.A.L.K.E.R. Call of Pripyat

Stalker Call of Pripyat is the most recent of the Stalker series which is about a future where the Chernobyl meltdown turned the area into a highly dangerous zone filled with viscous mutated creatures and supernatural anomalies. Many people referred to as stalkers flock there to hunt for precious materials and pre-meltdown artifacts. In Call of Pripyat you play as Major Alexander Degtyarev  a former stalker who goes to Chernobyl under the disguise of being a stalker again to investigate why five helicopters crashed for unknown reasons near Pripyat.

The game is an open world first person shooter which really emphasizes the open world potential you can go wherever whenever but if you aren't well equipped or experienced enough you can easily find yourself staring at more than a few game over screens while an anomaly floats along (concentrations of energy that doesn't follow the laws of physics space and time) or bandits run to your corpse to loot it. But better gear can be acquired in a multitude of ways, by either doing jobs for locals and being rewarded for good work OR killing said locals so you can just take their gear. (this method is not recommended if you ever wanted backup on a job) After a bit of this you can finally venture out and investigate the first crash site safely and begin your adventure.

The Stalker series is not for those looking for a casual experience this game will make you its b***h, you will die time after time after time again until you've practically become a Russian devgru operative. I'd highly recommend this game for a great game with hours of playability and even more of replayability as you can go through again and again with different tactics loadouts and missions all of which actually have effects on the world and the story.