head to head
Neither is simply harder - they are hard in different places. Command & Conquer: Renegade demands more execution; The Witcher 3: Wild Hunt demands more optimization.

Execution · Practiced Mastery
FPS aim welded to a team economy of base-destruction priorities.

Optimization · Practiced Mastery
A narrative action RPG where build planning matters more than reflex execution.
Command & Conquer: Renegade leans Execution (Practiced Mastery); The Witcher 3: Wild Hunt leans Optimization (Practiced Mastery).
Command & Conquer: Renegade leans clearly harder on execution.
Command & Conquer: Renegade
FPS aim in infantry and vehicle fights carries the game
The Witcher 3: Wild Hunt
Combat timing matters but generous dodges forgive sloppy play.
Command & Conquer: Renegade leans clearly harder on reads.
Command & Conquer: Renegade
Multiplayer base assaults involve predicting human team pushes
The Witcher 3: Wild Hunt
Enemies use fixed AI behaviours; no adaptation.
The Witcher 3: Wild Hunt leans a little harder on variance, though the gap is small.
Command & Conquer: Renegade
Maps and economy rules are fully known
The Witcher 3: Wild Hunt
Loot rolls and minor combat variance only.
The Witcher 3: Wild Hunt leans clearly harder on optimization.
Command & Conquer: Renegade
Credit economy and building-target priority decide C&C-mode matches
The Witcher 3: Wild Hunt
Builds, alchemy, and quest routing reward planning.
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.