head to head
Mega Force 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
A classic arcade shmup testing dodging reflexes against memorised enemy waves.
Half-Life 2 leans Execution (Pure Mechanics); Mega Force leans Execution (Pure Mechanics).
Mega Force leans clearly harder on execution.
Half-Life 2
Gravity gun and shooting demand precision.
Mega Force
Perfect dodging and shooting would clear every wave alone
Half-Life 2 leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Mega Force
Enemy waves are scripted, nothing adapts
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.
Mega Force
Spawn patterns repeat identically and map quickly
Mega Force leans clearly harder on optimization.
Half-Life 2
Linear progression with no builds.
Mega Force
Memorising wave order and scoring spots maximises runs
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.