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

Execution · Pure Mechanics
The refined sequel adding freestyle scratching and head-to-head DJ battles to the turntable formula.

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.
DJ Hero 2 leans Execution (Pure Mechanics); Half-Life 2 leans Execution (Pure Mechanics).
DJ Hero 2 leans clearly harder on execution.
DJ Hero 2
Faster scratch patterns plus freestyle sections
Half-Life 2
Gravity gun and shooting demand precision.
Half-Life 2 leans a little harder on reads, though the gap is small.
DJ Hero 2
No adaptive element
Half-Life 2
Combine AI scripted, non-adaptive.
Half-Life 2 leans a little harder on variance, though the gap is small.
DJ Hero 2
Charts fixed despite freestyle windows
Half-Life 2
Almost no randomness.
DJ Hero 2 leans a little harder on optimization, though the gap is small.
DJ Hero 2
Score multiplier and euphoria routing
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.