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

Execution · Pure Mechanics
A manic bullet-hell shooter testing reflexive dodging through dense scripted patterns.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Batsugun leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Batsugun leans clearly harder on execution.
Batsugun
Dodging dense bullet patterns at speed is the whole test
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Batsugun
Enemies follow fixed scripted waves, never adapt
Half-Life 2
Combine AI scripted, non-adaptive.
Batsugun leans a little harder on variance, though the gap is small.
Batsugun
Patterns are deterministic once learned, little randomness
Half-Life 2
Almost no randomness.
Batsugun leans a little harder on optimization, though the gap is small.
Batsugun
Route and powerup priorities reward scoring optimization
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.