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

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

Execution · Pure Mechanics
Tests twitch reflexes and multiplier discipline in dense side-scrolling arcade combat.
Half-Life 2 leans Execution (Pure Mechanics); Matterfall leans Execution (Pure Mechanics).
Matterfall leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Matterfall
Twitch dodging, dash-stuns and aim under bullet pressure
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Matterfall
Enemy waves are scripted arcade patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Almost no randomness.
Matterfall
Fixed levels with nothing meaningfully hidden
Matterfall leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Matterfall
Score multiplier preservation and augment choice reward routing
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.