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

Execution · Pure Mechanics
Tests execution against dense scripted boss patterns in handheld run-and-gun form.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Gunstar Super Heroes leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Gunstar Super Heroes leans clearly harder on execution.
Gunstar Super Heroes
Dense run-and-gun action demands precise dodging and weapon control
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Gunstar Super Heroes
Boss patterns are elaborate but completely scripted
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.
Gunstar Super Heroes
Stages play out identically each run
Half-Life 2
Almost no randomness.
Gunstar Super Heroes leans clearly harder on optimization.
Gunstar Super Heroes
Learning screen-filling boss movesets is the core progression
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.