head to head
Shredders 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
A snowboarding sim testing precise trick execution and line memorization.
Half-Life 2 leans Execution (Pure Mechanics); Shredders leans Execution (Pure Mechanics).
Shredders leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Shredders
Precise trick timing, balance and landing control dominate
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.
Shredders
Mostly solo/coop, no adaptive opponent to predict
Shredders leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Shredders
Slope conditions fixed, little randomness
Shredders leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Shredders
Learning lines and trick combos for score routes
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.