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

Execution · Pure Mechanics
A first-person cyberpunk slasher where everything dies in one hit, including you.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Ghostrunner leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Ghostrunner leans clearly harder on execution.
Ghostrunner
One-hit-death parkour and slashing demand near-perfect inputs
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Ghostrunner
Enemy placements are fixed
Half-Life 2
Combine AI scripted, non-adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ghostrunner
Deterministic levels
Half-Life 2
Almost no randomness.
Ghostrunner leans clearly harder on optimization.
Ghostrunner
Route planning and enemy-order solutions define fast clears
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.