Under its own Constitution, it could. But U.S. Constitution might have something to say about it. Not the case with laws regulating video games.
Actually, a State CAN bring back slavery, under limited circumstances
Thirteenth Amendment: "Section 1. Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction. "
Commit a felony, and there's nothing in the Constitution that would prevent a state from making you pick cotton for the rest of your life. States would have chain-gangs of criminals doing road repair in the South in the early 20th Century