American remake of the German movie "Das Experiment", which is based on the Stanford prison experiment that actually truly happened at the USA.
This movie is bad, extremely bad, to the point even that I have actually chosen to give this plainly the lowest score possible.
The fact behind this is that it is based on a real story, but as it only has a short time to show it, parts are omitted, changed, and in turn there are too many flaws in the storyline to make it a convinceable movie, like the fact that no violence was allowed, yet nothing happened when violence happened, not even when one got killed, and there's no reference at the end of the movie about it.
In all honesty, it all feels sloppy, put together in a whim, and forgotten to actually make it complete.
The only thing I could say is that the acting was sublime...

Still, on more of a side note: possibly I am biased when it comes to this, as I do know the story behind the Stanford prison experiment, and I am someone who doesn't see it in any way as a positive thing, and I see the one behind it, Philip Zimbardo, as a criminal and a lunatic. Let's not forget that the experiment was technically based on Nazism...
Apart of that, it hasn't caused any factual benefit, as do not forget about what happened at Abu Ghraib by the American Army...

Anyhow, possibly the movie "The Stanford Prison Experiment (2015)" is better, I do not know, I haven't watched it.
But regardless, I would advice to skip this one, as it is quite likely to leave you with more questions than answers, and not bringing across the full message...

Decent enough if unremarkable English-language take on Oliver Hirschbiegels superior Das Experiment, which itself was adapted from a novel (Black Box) which was inspired by a real experiment carried out at Stanford University in 1971. It was funded by the US Navy, and it was abandoned after only six days, when it went tits-up.

The story: a bunch of people are interviewed, and 24 are selected to participate in a social experiment: they are to be coached out to a camera-ed up detention centre, where eight will be selected to play the role of prison guards while the remaining sixteen will adopt the role of prisoners. The experiment is scheduled to last for fourteen days, at the end of which the participants will receive their pay: fourteen grand each. There are rules though, and if any of them are broken a red light will come on signalling the end of the experiment, and no one will be paid: The "prisoners" may not speak to the "guards" unless spoken to first. The "prisoners" are to be given three meals per day, but they must finish their plates. The "Prisoners" must participate in one hour of physical activity every day. If the "prisoners" break any of the rules or play up in any other way, they are to be punished "commensurably" within 30 minutes. There is to be no actual violence committed (odd one, this, as the violence erupts long before the red light eventually comes on. Perhaps those conducting the tests considered the acts "commensurable" to the acts of the prisoners. I dunno). If anyone wants out and quits, it's over for everyone. Anyway, our hero is "prisoner" Adrien Brody (King Kong, Predators) as a pacifist hoping to get some quick cash so's he can follow his latest squeeze out to India where they can "find themselves" and whatnot, and our villain is "guard" Forest Whittaker (Phonebooth, The Last King of Scotland), an initially shy, gently-demeanored man who still lives with his parents, and who befriends Brody at the interview stage, but who allows himself to be sucked utterly into his role as guard, and who is subsequently absolutely corrupted by his absolute "power". Within a matter of days.

The two leads - Oscar winners, both - are clearly slumming it, but they by no means ham it up or chew the scenery. The whole thing is done and dusted in a brisk ninety minutes and as a result there's little time whilst watching to consider the shortcomings or flaws until later (who are these people conducting this experiment, anyway? Why the oppressive, dangerous rule-set? Why don't they leap in as soon as the violence rears up? Why are apparently straight men ready to rape each other like 40-year lifers, when they've only been in there 5 days? Even if the would-be rapist is gay, can't he hold off for a bloody week before resorting to sexual assault? Why is an actor of clearly Hispanic/Mexican descent playing a white supremacist?). It's a decent enough if forgettable way to knock out an hour-and-a-half.