Building comparison
head to head
Slay the SpirevsTharsis
Slay the Spire asks more than Tharsis, and the gap is optimization.
Slay the Spire
Optimization · Systems & Chaos
A deckbuilding roguelike where adapting builds to random offers wins runs.
Tharsis
Variance · Systems & Chaos
Tests probability management as dice rolls repeatedly threaten a doomed Mars mission.
Slay the Spire leans Optimization (Systems & Chaos); Tharsis leans Variance (Systems & Chaos).
Slay the SpireTharsis
Axis by axis
Execution0 vs 0
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Slay the Spire
Turn-based, zero input precision required.
Tharsis
Assigning dice needs no dexterity
Reads1 vs 0
Slay the Spire leans a little harder on reads, though the gap is small.
Slay the Spire
Enemy intents shown; behaviour scripted, not adaptive.
Tharsis
Disasters are random events, not an adapting mind
Variance7 vs 8
Tharsis leans a little harder on variance, though the gap is small.
Slay the Spire
Card and relic offers drive every run.
Tharsis
Dice rolls and event draws brutally dominate each turn
Optimization9 vs 7
Slay the Spire leans clearly harder on optimization.
Slay the Spire
Deck shaping and combat math are solvable.
Tharsis
Crew allocation and risk math are the counterplay
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.