If not currently on sale for free, you can find the complete edition at these official retailers:
Once you have the game, use these community resources to find secrets and unlockables: Goat Simulator: GOATY Edition Free Download
is a complete package that includes the base game and all released DLCs, such as Goat MMO Simulator, GoatZ, PAYDAY, and Waste of Space. If not currently on sale for free, you
This title is frequently featured in rotating free game giveaways. Check the Epic Games Store periodically to see if it is currently available at no cost. such as Goat MMO Simulator