Games chosen as finalists can participate only once in the festival.
You can register as many times as you want, as long as the game is within the 2-year limit after its release!
As soon as your game is selected as a finalist, it will not be possible for it to participate in the festival again.
As mentioned in the regulations:
2.4. Games that have previously been finalists in any category of the competitive exhibition from other editions of the Festival will not be selected.
2.5. Games that have already been selected for the non-competitive showcase (Panorama Brasil) cannot participate again, but they can participate in the competitive showcase.
To learn more about the regulations, visit: BIG Festival Rules