It sounds like you're looking for Planet Zoo with all DLCs included, available as a free download, related to the lifestyle and entertainment genre.
Let me be blunt about why “hot downloads” for Planet Zoo DLC are a nightmare: planet zoo all dlc free download hot
Planet Zoo has received overwhelmingly positive reviews from critics and players alike. On Steam, the game has a 92% positive review rating, with many reviewers praising its realistic graphics, addictive gameplay, and attention to detail. It sounds like you're looking for Planet Zoo
Humble Bundle: Planet Zoo is a frequent guest on Humble Bundle. You can sometimes get the base game and several DLCs for under $15, with a portion of your money going to charity. available as a free download