head to head
Neither is simply harder - they are hard in different places. Super Mario Galaxy demands more execution; The Witcher 3: Wild Hunt demands more optimization.

Execution · Practiced Mastery
Mid-demand 3D platforming execution across fixed gravity puzzles.

Optimization · Practiced Mastery
A narrative action RPG where build planning matters more than reflex execution.
Super Mario Galaxy leans Execution (Practiced Mastery); The Witcher 3: Wild Hunt leans Optimization (Practiced Mastery).
Super Mario Galaxy leans clearly harder on execution.
Super Mario Galaxy
Gravity-bending jumps need timing, though forgiving by Mario standards
The Witcher 3: Wild Hunt
Combat timing matters but generous dodges forgive sloppy play.
The Witcher 3: Wild Hunt leans a little harder on reads, though the gap is small.
Super Mario Galaxy
Bosses repeat fixed patterns - nothing adapts
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.
Super Mario Galaxy
Galaxies are scripted; surprises evaporate after one visit
The Witcher 3: Wild Hunt
Loot rolls and minor combat variance only.
The Witcher 3: Wild Hunt leans clearly harder on optimization.
Super Mario Galaxy
Star routes and comet challenges reward learned solutions
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.