The Thirteenth Floor

Computer scientist Hannon Fuller has discovered something extremely important. He's about to tell the discovery to his colleague, Douglas Hall, but knowing someone is after him, the old man leaves a letter in the computer generated parallel world his company has created (which looks like the 30's with seemingly real people with real emotions). Fuller is murdered in our real world the same night, and his colleague is suspected. Douglas discovers a bloody shirt in his bathroom and he cannot recall what he was doing the night Fuller was murdered. He logs into the system in order to find the letter, but has to confront the unexpected. The truth is harsher than he could ever imagine...

Thoughtful Sci-Fi in the Vain of Gattaca
The Thirteenth Floor is a thoughtful and engaging film that asks its audience to think about the difference between reality and virtual reality. The Matrix asks similar questions in an action format appealing to a wider audience, but the Thirteenth Floor exceeds the Matrix in two respects. First, it uses a thoughtful approach that establishes its characters as more than 2-D, comic-book type heroes and villains. Second, it builds longer and with more subtlety, so that the payoff comes much later.

And a delightful payoff it is. Imagine the Matrix with less action fluff, real human relationships, and a plot twist reminiscent of the Sixth Sense. Fans of thought-provoking science fiction in the vain of Gattaca will enjoy the Thirteenth Floor just as well.

https://www2.zoechip.com/watch-movie/the-thirteenth-floor-53267.5402980