head to head
Hidden & Dangerous 2 asks more than Grand Theft Auto: San Andreas, and the gap is execution.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Optimization · Practiced Mastery
Planning squad approaches to scripted missions where one mistake kills.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Hidden & Dangerous 2 leans Optimization (Practiced Mastery).
Hidden & Dangerous 2 leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Hidden & Dangerous 2
Deliberate aim and stealth movement punish sloppy hands
Hidden & Dangerous 2 leans a little harder on reads, though the gap is small.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Hidden & Dangerous 2
German AI follows patrol scripts, not adapting to you
Hidden & Dangerous 2 leans a little harder on variance, though the gap is small.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Hidden & Dangerous 2
Patrol routes and enemy positions are unknown first attempt
Hidden & Dangerous 2 leans a little harder on optimization, though the gap is small.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Hidden & Dangerous 2
Squad planning, loadouts and approach routing decide missions
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.