head to head
Silver Surfer 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 one-hit-death shmup execution over patterns that must be memorised to survive.
Half-Life 2 leans Execution (Pure Mechanics); Silver Surfer leans Execution (Pure Mechanics).
Silver Surfer leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Silver Surfer
One-hit deaths demand near-perfect dodging every second
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Silver Surfer
Enemy waves are fully scripted 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.
Silver Surfer
Stages replay identically once learned
Silver Surfer leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Silver Surfer
Memorising spawn patterns and safe lines is mandatory study
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.