It has a "Very Positive" rating on Steam for its humorous, physics-based "brutality". 3. Classic Zoo Keeper (1994 or Puzzle Versions) App of the Day: Zookeeper Battle | Eurogamer.net
Requires Windows 10, an Intel i5 3570 / AMD FX-6350 processor, and 3 GB of disk space. 2. ZooKeeper Simulator zookeeper-pc-game-free-download-full-version
Usually around $4.99 on Steam , though discounts occur. It has a "Very Positive" rating on Steam