Please note that I have not seen this movie in about 20 years, I may have false memories and unintentionally give false details.

General Info

I seen this movie between year 2002-2008, year up or year down. It was approximately released between those years.

The movie is dubbed to Spanish of Spain, because I seen it in Spanish language.

Probably it is a B movie or TV movie from USA, because I think I remember american actors in the movie, and the movie scenes and how it is directed seems mostly Hollywood style for me. 

The protagonist, which was a middle-aged man, I think it could be a famous secondary American actor from that decade.

Genre

The genre is 'Isolation Horror' but much more focused to action than to horror, so another good terms to define the genre could be 'Battle Royale' or 'Deathmatch'.

The movie has various action scenes and, from what I think I remember, a little of sci-fi too.

Plot (as I think I remember)

A middle-aged man (the protagonist) and several other people who do not know each other, meet in one place. They are then taken away and locked up against their own will in a kind of closed complex, a facility or build. Each person is put in a different room, separated each other, and forced to kill each other. Whoever survives will be able to leave that place (win the game). 

I remember this people who were forced to kill each other, they find weapons like guns, shotguns or machine guns.

I can't remember anything in particular too clearly, but I think all of that above is pretty much what I said.

Now all the next sentences are just speculation:

It is possible that the protagonist and the strangers came to the place by invitation, as if to earn money (something similar to the movie 'House on Haunted Hill').

It is also possible that the protagonist lost the memories of him when he is locked in that place to fight to the death against others. Maybe because a drug to sleep that produced Amnesia on him (something similar to the movie 'ARQ').

And also, I think there is a girl or a boy in the place, a very young person, and the protagonist finds him and decides to protect him at all costs so that others do not kill him. I think at the end of the movie the protagonist sacrifices himself to save this younger person.

Perhaps it is also possible that there was a kind of "telepathic communication" between the protagonist and the evil owner / leader / creator of this deatmatch. I may be wrong and that this is just a false memory, but I think I remember that the protagonist is spoken telepathically or perhaps through an implanted chip, or maybe just a TV or a CAM, and they harass him a bit in this way to make him lose his faith and his courage.

Research and References

I looked into loads and loads of filmographies from secondary actors like Eric Roberts, John Saxon, Alec Baldwin, Stephen Baldwin or Corin Nemec, because they are good candidates who resemble the vague memories that I have of the appearance of the actor. But as it is evident, I did not find the movie in their filmographies. Nevertheless, there is always the big chance that I have just missed this movie in any filmography from those actors, because they have many movies and I tried to discard any movie that at first sight seems not dubbed to Spanish.

To help you discard, these are some movies (dubbed to Spanish) with similarities with the movie that I'm looking for are:

• Cube (1997)
• Cube 2 (2002)
• Death Factory (2002)
• Cube 3 (2004)
• House of 9 (2005)
• Severance (2006)
• The Condemned (2007)
• Breathing Room (2008)
• Exam (2009)
• The Killing Room (2009)
• The Tournament (2009)
• Operation: Endgame (2010)
• The Human Race (2013)
• The Belko Experiment (2016)

And some not dubbed to Spanish or whose I'm unsure they are:

• Kill Theory (2009)
• Vile (2011)
• Inhuman Resources (2012)
• Raze (2013)
• Circle (2015)

I really looked in thousands of these kind of movies, without luck. There are lists of 'Isolation Horror' movies in IMDB and in some other websites. I think the movie I'm looking for would not be a much known movie like are those from the list.

In the worst case I can think, it is possible that the movie in reality could be a TV mini serie of two or three chapters, or a long-length episode from a anthological sci-fi series (like The Outer Limits).