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

Execution · Practiced Mastery
A Pac-Man-style routing and dodging test wearing an Alien license.

Optimization · Practiced Mastery
A narrative action RPG where build planning matters more than reflex execution.
Alien leans Execution (Practiced Mastery); The Witcher 3: Wild Hunt leans Optimization (Practiced Mastery).
Alien leans clearly harder on execution.
Alien
Maze dodging under drone pursuit is pure timing
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.
Alien
Drones chase with simple fixed logic, nothing adaptive
The Witcher 3: Wild Hunt
Enemies use fixed AI behaviours; no adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien
Drone movements vary slightly per attempt
The Witcher 3: Wild Hunt
Loot rolls and minor combat variance only.
The Witcher 3: Wild Hunt leans clearly harder on optimization.
Alien
Optimal egg-clearing routes are quickly mappable, Pac-Man style
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.