In Texas, as in the rest of the United States, the legality of downloading a game that you own generally falls under the fair use doctrine and the principles surrounding copyright. If you own a physical copy of a game, you may be allowed to make a personal backup or download a digital copy for your own use. However, this can be complicated by the terms of service of the game and any licensing agreements that accompany it.
It's important to note that while you can download a game you own for personal use, sharing it or distributing copies without permission would likely violate copyright laws. Always consider the specific terms of service associated with the game and consult legal expertise if you have concerns or specific situations in mind.