A PlayStation Plus Premium subscription, a stable high-speed internet connection, and a compatible controller (like a DualShock 4 or DualSense).
One hidden benefit of playing via RPCS3 is the modding scene. While Tokyo Jungle never had official mod support, the emulation community has created patches that enhance the experience:
The game is set in a futuristic, deserted Tokyo. The human race has mysteriously disappeared, leaving the city’s infrastructure to crumble. In their absence, domestic pets and zoo animals have escaped and formed factions. The game poses a simple question: In a world without humans, which animal will rise to the top of the food chain?