MMORPG Boss Practice Sims and Calculators
Practice famous MMORPG boss mechanics in your browser, then plan your grind with game-specific calculators. Covers Final Fantasy XIV, Lost Ark, Old School RuneScape, World of Warcraft, Black Desert Online, Guild Wars 2, ESO, and New World. Free, no account, no downloads.
Boss Practice Sims
Interactive simulations of real boss fights. Learn the mechanics before your first pull: dodge telegraphs, bait AoEs, and practice positioning with zero repair bills.
Final Fantasy XIV
- Titan Extreme PracticeDodge Landslide lines, bait Weight of the Land, and handle Geocrush falloff in the FFXIV trial.
- Ifrit Extreme PracticeBait Eruption circles, track Ifrit's dashes, and manage Searing Wind in the FFXIV trial.
- Leviathan Extreme PracticeDodge Body Slam geysers, handle Dreadstorm pools, and survive Tidal Wave in the Whorleater trial.
- Shiva Extreme PracticeWhiteout donut, Heavenly Strike knockback, Glass Dance cone, and Avalanche lines in the Akh Afah Amphitheatre.
Lost Ark
Old School RuneScape
World of Warcraft
MMORPG Calculators
Plan the grind: XP, drop odds, honing, enhancing, and profits. All math runs in your browser.
Old School RuneScape
- OSRS XP CalculatorXP needed to reach your target level, and XP remaining, for every skill.
- OSRS Drop Rate CalculatorYour chance of landing a rare drop over any number of kills.
- OSRS GP per Hour CalculatorEstimate profit per hour from loot, kills, and supply costs.
World of Warcraft
Final Fantasy XIV
Lost Ark
Black Desert Online
Guild Wars 2
The Elder Scrolls Online
New World
Community-made open source tools
Beyond our own sims and calculators, players build excellent open source MMORPG tools: log parsers, overlays, gear planners, and market trackers. We verified the licenses and listed the best in our open source MMORPG tools directory.
Frequently asked questions
What is a boss practice sim?
A boss practice sim is a free browser simulation of a famous MMORPG boss fight. It recreates the boss's real telegraphs and mechanics, such as line AoEs, baited circles, and stack markers, so you can practice dodging and positioning before you face the real fight with your party.
Are these sims official tools from the game publishers?
No. These are fan-made practice tools built from publicly documented fight mechanics. They are not affiliated with or endorsed by Square Enix, Smilegate, Jagex, Blizzard, Pearl Abyss, ArenaNet, ZeniMax, or Amazon Games.
Which games are covered?
The hub covers Final Fantasy XIV, Lost Ark, Old School RuneScape, World of Warcraft, Black Desert Online, Guild Wars 2, The Elder Scrolls Online, and New World, with boss sims for FFXIV, Lost Ark, OSRS, and WoW plus calculators for all eight games.
Do the sims need downloads or accounts?
No. Every sim and calculator runs entirely in your browser. Nothing to install, no account to create, and your progress never leaves your device.
How accurate are the calculators?
Each calculator uses the rates and formulas the game community has verified, and every page says when the numbers were last checked. Game patches change rates, so that date matters. Always sanity-check against current guides.
Are these tools free?
Yes. All sims and calculators are free forever, with no accounts, no limits, and no downloads.