You can download the game through the Steam Store or the Epic Games Store . Beware of "Free Download" Sites
If you strictly want a free "Worms" experience on your PC browser without a purchase, you should look at: Worms Rumble PC Download Free
A free-to-play demo was available on Steam during its launch period to let players test the 32-player real-time combat. Totally Free Alternatives You can download the game through the Steam