head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Pure Mechanics
An on-rails comedic shooter testing precise aim against scripted waves.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Gal*Gun 2 leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Gal*Gun 2
on-rails aiming and timing precision
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Gal*Gun 2
scripted enemy waves, no adaptation
Half-Life 2
Combine AI scripted, non-adaptive.
Gal*Gun 2 leans a little harder on variance, though the gap is small.
Gal*Gun 2
minor randomness in encounters
Half-Life 2
Almost no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Gal*Gun 2
weapon/route choice
Half-Life 2
Linear progression with no builds.
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.