In which we basically see what the main character sees? Maniac (2012) and Into The Void are the only ones that come to mind.
I'm so scared your little head will come off in my hands!
Peeping Tom (1960) has some scenes in the PoV style as the killer films his murders.
shareThe opening scene from Halloween (1978)
Here's the clip: https://vimeo.com/172245967
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Every person that served can be called a veteran, but not every veteran can be called a Marine.
If you enjoy watching dog *beep* Uwe Boll's House of the Dead has a lot of FPV. It's terrible though.
shareBunker of the Dead
...a little fantastic, and fleeting, and out of reach.
Though not first person Shoot 'em Up is similar in action.
I'm sorry, but no one's looking for you.
Ben Braddock, The Graduate (1967) https://vimeo.com/173208189
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Every person that served can be called a veteran, but not every veteran can be called a Marine.
In addition to those, Russian Ark is apparently the only other movie like this and I assume is actually the reason that Hardcore Henry is mostly a Russian film.
I also assume you meant Enter the Void although as I recall a large portion is filmed from over his shoulder or other such things.
Maniac did have some non-pov moments but I think it still managed about 90% so definitely qualifies.