head to head
Night Stalker asks more than Half-Life 2, and the gap is variance.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.

Execution · Pure Mechanics
A top-down maze shooter about surviving robots while grabbing a randomly-placed gun.
Half-Life 2 leans Execution (Pure Mechanics); Night Stalker leans Execution (Pure Mechanics).
Night Stalker leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Night Stalker
Shooting and dodging robots in the maze is the lead demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Combine AI scripted, non-adaptive.
Night Stalker
Enemies are scripted, not adaptive minds
Night Stalker leans clearly harder on variance.
Half-Life 2
Almost no randomness.
Night Stalker
Random gun placement and enemy movement add chaos
Night Stalker leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Night Stalker
Learning maze flow and gun-grab timing rewards play
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.