Games similar to Thief include The Elder Scrolls. It's paid, but OpenMW and The Dark Mod are free. Other options are Cyberpunk 2077, Deus Ex, Metro and Far Cry. You're spoiled for choice with First-Person Shooters like Thief: we list more than 25 alternatives for Windows, Linux, Mac, Android and iPhone.
Syphon Filter is a third-person shooter video game series, developed by Bend Studio, known for its blend of action, stealth, and puzzle-solving elements, following the protagonist Gabe Logan's missions to rid the world of the Syphon Filter virus.
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Infected Shelter is an ultra-violent rogue-lite post-apocalyptic beat'em up. Singleplayer and co-op for up to four players.
