head to head
Hand Simulator: Survival asks more than Half-Life 2, and the gap is variance.

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

Execution · Pure Mechanics
A survival game whose difficulty comes from awkward physics-based hand control.
Half-Life 2 leans Execution (Pure Mechanics); Hand Simulator: Survival leans Execution (Pure Mechanics).
Hand Simulator: Survival leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Hand Simulator: Survival
Clumsy fine motor control of hands is the whole joke
Hand Simulator: Survival leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Hand Simulator: Survival
Other players exist but combat is chaotic, not modeling
Hand Simulator: Survival leans clearly harder on variance.
Half-Life 2
Almost no randomness.
Hand Simulator: Survival
Physics chaos and spawns create unpredictable situations
Hand Simulator: Survival leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Hand Simulator: Survival
Crafting and survival systems reward some planning
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.