A young software programmer builds a loving avatar, which is the complete opposite of his personality. When this avatar frees a beautiful woman from her captors, embezzes a casino, and circumvents national security, he decides it’s time to cross the border: just have to try not to get killed on the way.

Based on your response to Richiev and me, I took some liberties with your story - make this your own.
Leaning towards:
“When his virtual dark side persona wreaks havoc across the city, a marked programmer must reinvent his good guy identity in order to escape across the US border”

Take care.

Richiev, este avatar es una especie de virus. No tiene la misma estructura moral de su creador; me lo imagino una suma de rebeldes y mujeriegos, ladrones encantadores y magos de la estafa. Y usaría todos los recursos de una sociedad tecnológica

Odie, me imagino a este avatar conectado permanentemente a la red, buscando mujeres desesperadas para conversar. Una de estas mujeres está prisionera. El avatar logra burlar a sus captores, tal vez cruce llamadas o envíe falsos mensajes.

I had the same question. I am not sure if what I think of an Avatar is what Oscuro is thinking of

Oscuro, how does this digital avatar free a captive, or do any of these things being stuck in a computer?

Thanks.