head to head
Skate. asks more than Half-Life 2, and the gap is execution.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.

Execution · Pure Mechanics
A physics-driven skateboarding game where analog trick execution precision is the entire skill dimension.
Half-Life 2 leans Execution (Pure Mechanics); Skate. leans Execution (Pure Mechanics).
Skate. leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Skate.
Flick-it controls for tricks demand precise analog stick timing
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Skate.
No adaptive opponent in the trick-execution sandbox
Skate. leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Skate.
Physics engine introduces mild chaos on complex terrain
Skate. leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Skate.
Spot selection and trick sequencing for score chases have learnable optimal lines
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.