There are a few films from 2018 that might fit this description, but the most prominent "Relentless" (often released under different titles in various regions) is likely:
Prisoner of War (released as Relentless in some markets). Starring: Scott Adkins, Peter Shinkoda, and Cowboy Cerrone. Relentless (2018) Dual Audio Hindi ORG 720p.mkv
If you are looking for high-quality, official versions of this film, you can check these platforms: There are a few films from 2018 that