According to the Far Cry Wiki , several mechanical changes were made to balance the game for controllers:

The main story averages approximately 10 hours and 30 minutes . Key Differences from PC Version

It is a digital-only container file, not an ISO/God format commonly used for retail disc games. Multiplayer: Supports 1-4 players locally. Gameplay Considerations

The game is playable on Xbox One through backward compatibility.

Enemy body armor no longer protects them from damage.

For modified Xbox 360 consoles (Jtag/RGH), the game is classified as an title: