head to head
Beach Head 2002 asks more than Half-Life 2, and the gap is execution.

Execution · Pure Mechanics
A fixed-position shooter testing aim and target prioritization against waves.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
Beach Head 2002 leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
Beach Head 2002 leans clearly harder on execution.
Beach Head 2002
Aim and target prioritization under fire dominate
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
Beach Head 2002
Enemy waves scripted, not adapting to you
Half-Life 2
Combine AI scripted, non-adaptive.
Beach Head 2002 leans clearly harder on variance.
Beach Head 2002
Attack timing and approach vectors vary
Half-Life 2
Almost no randomness.
Beach Head 2002 leans a little harder on optimization, though the gap is small.
Beach Head 2002
Weapon switching and threat priority improve survival
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.