head to head
Thumper 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
Brutal rhythm-violence game where perfect timing on a screaming track is all that exists.
Half-Life 2 leans Execution (Pure Mechanics); Thumper leans Execution (Pure Mechanics).
Thumper leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Thumper
Split-second rhythm inputs at speed are the entire test
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Thumper
No opponent, only the track
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.
Thumper
Tracks are fixed and learnable
Thumper leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Thumper
Memorizing patterns and scoring lines helps mastery
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.