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

Execution · Pure Mechanics
A run-and-gun boss rush about dodging scripted patterns with tight inputs.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Cuphead leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Cuphead leans clearly harder on execution.
Cuphead
Tight dodging and parry timing decide every boss.
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Cuphead
Bosses cycle scripted phases; no adaptation to player.
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.
Cuphead
Minor attack-order shuffling between phases.
Half-Life 2
Almost no randomness.
Cuphead leans clearly harder on optimization.
Cuphead
Loadouts and boss phase order are fully learnable.
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.