Eternity (2013)

It's a rip-off of "Tron" (1982) with a British accent and a detective story for side quest. The main idea is the same, people digitised and trapped inside a computer, trying to find a way out. But, unlike "Tron", this film doesn't have an ending, the story plays on a closed loop. Unfortunately, the lack of an ending feels lazy, as there are many lost opportunities for a more interesting plot (e.g., someone from outside could have noticed that something was wrong with the simulator resetting all the time and do something, like debugging it).