prerelease
/ˈprɪriːlɛs/Definitions
1. noun
A preliminary release of a product, especially a software or video game, before its official release.
“The company decided to do a prerelease of the new game to gather feedback from gamers.”
2. verb
To release or make available a product, especially a software or video game, before its official release.
“The developers chose to prerelease the game on a limited basis to test its stability.”