Building comparison
head to head
Once HumanvsUnderMine
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.
Once Human
Optimization · Practiced Mastery
Progressing through a contaminated open world by solving its scenario tech tree and optimising base builds.
UnderMine
Optimization · Systems & Chaos
An action roguelike about mining gold, dying, and upgrading the next peasant down.
Once Human leans Optimization (Practiced Mastery); UnderMine leans Optimization (Systems & Chaos).
Once HumanUnderMine
Axis by axis
Execution5 vs 5
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Once Human
Third-person shooting and dodge rolls require real aim and timing
UnderMine
Pickaxe-throw combat and dodging in real time
Reads0 vs 0
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Once Human
Deviant creatures follow scripted attack patterns only
UnderMine
Dungeon creatures are scripted
Variance5 vs 6
UnderMine leans a little harder on variance, though the gap is small.
Once Human
Deviant spawn composition and loot tables carry meaningful randomness
UnderMine
Random layouts, relics, and curses each run
Optimization7 vs 7
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Once Human
Scenario tech tree, base construction, and gear crafting are solvable
UnderMine
Relic synergies and permanent meta upgrades compound
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.