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OSRS Colosseum Simulator

Browser-based Sol Heredit trainer. Practice every phase, attack, and solar flare level without entering the Colosseum.

Calendar
May 25, 2026

The Colosseum Simulator runs in a browser. Sol Heredit, all six phases, all five attacks. No client, no login.

https://colosseum-simulator.detuks.com/

What it simulates

  • Sol Heredit boss fight on the Fortis Colosseum arena
  • Six phase transitions at the real HP thresholds: 1500, 1350, 1125, 750, 375, 150
  • Attack pool: spears, shields, triple parry (short and long, gated by phase), grapple, phase transitions
  • Solar flare orbs at levels 0, 1, 2, 3
  • Echo Sol settings: 1725 HP, pool spawning, following lasers
  • 3D scene toggle

Reinforcement waves are not simulated. The fight is Sol Heredit only.

Practice modes

  • Right-click Sol to set his HP and skip to any of the six phases
  • Toggle each attack type off independently to drill the ones you want
  • Toggle phase transitions off to drill a single phase in isolation
  • Phase-gated attacks: triple short P1–P2, triple long P3+, grapple P2+

Loadouts

One preset: Max Melee. Scythe of Vitur with Blade of Saeldor swap, Torva, Avernic, Ferocious, Primordial, Ultor, Saradomin brews and super restores.

Inventory-level breakdowns and lower-tier setups live in Detuks Colosseum Plugin Loadouts.

Not yet implemented

  • Grapple perfect parry

Runs in the browser

WebGL, no install, settings persist in localStorage, works on phones.

If you would rather not learn it

The simulator teaches the fight. The Detuks Colosseum Plugin does the fight. Pick whichever matches the time you want to spend.

Other simulators

Inferno, Jad, and Zuk: https://inferno-simulator.detuks.com/

Credits

Click Credits in the simulator sidebar for the in-app list. Summary:

  • Jagex — all Old School RuneScape assets
  • Supalosa — engine and Colosseum logic
  • Tesla Owner — engine
  • KiwiIskadda — detailed mechanics feedback
  • Syndra, Varadium, ro0bo, zyth — early feedback and testing
  • @kattykoo on Discord — Colosseum tips and tricks

Built on the open-source OldSchoolSDK engine.

Source

https://github.com/detuks-client/InfernoColoSimulator — colosseum branch holds the Sol Heredit simulator; master holds the Inferno simulator.

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