head to head
Grand Theft Auto V asks more than Half-Life 2: Lost Coast, and the gap is reads.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
A short graphics showcase testing basic shooter execution for twenty minutes.
Grand Theft Auto V leans Execution (Practiced Mastery); Half-Life 2: Lost Coast leans Execution (Practiced Mastery).
Grand Theft Auto V leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Half-Life 2: Lost Coast
A short stretch of standard Half-Life 2 gunplay
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Half-Life 2: Lost Coast
A handful of scripted Combine soldiers
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Half-Life 2: Lost Coast
One fixed level with nothing hidden
Grand Theft Auto V leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Half-Life 2: Lost Coast
Too brief to develop any systems layer
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.