Building comparison
head to head
Fallout 4vsUndertale
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.
Fallout 4
Optimization · Pure Optimization
An open-world shooter-RPG won by perk routing and weapon mod optimization.
Undertale
Optimization · Pure Optimization
A scripted RPG where pattern-learning and pacifist routing carry you.
Fallout 4 leans Optimization (Pure Optimization); Undertale leans Optimization (Pure Optimization).
Fallout 4Undertale
Axis by axis
Execution4 vs 4
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
FPS aiming, VATS softens demand
Undertale
Bullet-hell dodging in scripted patterns
Reads1 vs 1
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
Scripted enemy AI
Undertale
NPCs follow fixed dialogue trees, not adaptive
Variance2 vs 1
Fallout 4 leans a little harder on variance, though the gap is small.
Fallout 4
Loot and legendary rolls
Undertale
Minimal randomness in encounters
Optimization7 vs 7
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
Perks, settlement, weapon mod planning
Undertale
Learning fixed boss patterns and mercy routes wins
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.