WAY More details on major graphics overhaul on Dead Island Definitive + Riptide Definitive over here:
Higher Quality Textures
Game textures have been redone in a higher resolution and the level of quality has been improved across the board
Photorealistic new lighting system
The lighting system in the game has been vastly improved, providing a much more realistic look to the beautiful sunny tropical setting
Physically based shading
The introduction of new physically based shading techniques due to the latest iteration of the Chrome Engine means a higher quality look to the game models and objects as they react in a more realistic way to various lighting conditions
Image quality enhancements via anti-aliasing
The addition of more sophisticated anti-aliasing means that console players can now experience
Dead Island without unsightly “jaggies“ – meaning a much cleaner look throughout
Improved-quality game models and geometry assets
All major geometry assets (for example: NPCs and character models) highlight a marked quality increase
HBAO and motion blur effects
The introduction of Horizon-based Ambient Occlusion adds a extra layer of depth and realism to the world
Through a better implementation of object shadows, while the all-new motion blur effects will provide a much more cinematic feel to the game experience.
Updated game UI
Providing a more consistent look between both Dead Island and Dead Island Riptide. Increase to equal quality level for seamless game experience.
The Current-gen Console Experience
The Dead Island Redux Collection will also of course take advantage of the latest console features such as Online 4 Player Co-op, PS Vita Remote-Play (PS4), Share-Play (PS4), streaming and recording
Power Fists Power-up
And last but not least, The fan favourite unofficial PC mod will also now be added to both products. Punch your way through the mayhem with craziest power-up ever!