head to head
Neither is simply harder - they are hard in different places. Biped demands more optimization; Grand Theft Auto V demands more reads.

Execution · Practiced Mastery
A co-op puzzle platformer where each player walks a tiny robot by controlling its legs individually.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Biped leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Biped leans a little harder on execution, though the gap is small.
Biped
Per-leg stick control demands real coordination
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Biped
Pure co-op; nothing adapts to you
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Biped
Puzzles are deterministic
Grand Theft Auto V
Some mission and lobby randomness.
Biped leans clearly harder on optimization.
Biped
Solving each two-robot puzzle is the core test
Grand Theft Auto V
Heists, money loops, builds learnable.
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.