head to head
Ready or Not asks more than Half-Life 2, and the gap is reads.

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

Execution · Pure Mechanics
Tactical SWAT shooter with lethal TTK.
Half-Life 2 leans Execution (Pure Mechanics); Ready or Not leans Execution (Pure Mechanics).
Ready or Not leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Ready or Not
Lethal TTK and recoil punish slop
Ready or Not leans clearly harder on reads.
Half-Life 2
Combine AI scripted, non-adaptive.
Ready or Not
Mostly scripted suspects, limited reads
Ready or Not leans clearly harder on variance.
Half-Life 2
Almost no randomness.
Ready or Not
Suspect placement and AI behavior varies
Ready or Not leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Ready or Not
Loadouts, breaching tools, team plans
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.