Yeah, Mass Effect (though I wouldn't call it open world) fits extremely well. It should be getting a re-release of all three games plus DLC in about two months.
You don't get to create the character but has open world shooting:
Experience Aloy’s legendary quest to unravel the mysteries of a future Earth ruled by Machines. Use devastating tactical attacks against your prey and explore a majestic open world in this award-winning action RPG!
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Arthur Morgan and the Van der Linde Gang are outlaws on the run. With federal agents and bounty hunters massing on their heels, the gang must rob, steal, and fight their way across the rugged heartland in order to survive.
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Ushering in a new era for the METAL GEAR franchise with cutting-edge technology powered by the Fox Engine, METAL GEAR SOLID V: The Phantom Pain, will provide players a first-rate gaming experience as they are offered tactical freedom to carry out open-world missions.
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I
think you get to make your character in S.T.A.L.K.E.R. but it's been a long time
Includes 3 items: S.T.A.L.K.E.R.: Call of Pripyat, S.T.A.L.K.E.R.: Clear Sky, S.T.A.L.K.E.R.: Shadow of Chernobyl
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If you liked EVE, you might like the X series. Here's the latest:
Thrilling space battles meet deep strategy. X4 invites you to explore, fight, trade, and build an empire in a dynamic, fully simulated space sandbox, where every decision shapes your journey.
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Fallout 3: New Vegas is kinda old but it fits the bill.
Welcome to Vegas. New Vegas. Enjoy your stay!
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Elex fits, too, assuming you build a character that's into shooting. Expect to do lots of running away at the start.
ELEX is a handcrafted action role-playing experience from the award-winning creators of the Gothic series, set in a brand new post-apocalyptic Science Fantasy universe that puts players into a huge seamless game world full of original characters, mutated creatures, deep moral choices and...
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Oh, and Outer Worlds! Not as difficult as Elex, from what I hear.
The Outer Worlds is an award-winning single-player RPG from Obsidian Entertainment and Private Division. As you explore a space colony, the character you decide to become will determine how this player-driven story unfolds. In the colony's corporate equation, you are the unplanned variable.
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