d2r-mythos/MythosLoader

Features · How it works · Security · Getting started · FAQ · Website · Discord

MythosLoader lets you play several Diablo II: Resurrected accounts on one PC at the same time. Add each Battle.net account once, then launch one, a few, or all of them with a single click. Every game window gets its own name, so you always know which client is your Sorceress and which is your Barbarian, and a press of a button tells you exactly where each one is on your screens.

No more logging in by hand. No more alt-tabbing through four identical windows called "Diablo II: Resurrected". No command windows flashing, no extra tools to download.

_{The Loaders tab with three demo loaders running.}

• Why MythosLoader
• Features
  • Accounts and saved logins
  • Run several clients side by side
  • Close, crash recovery and relaunch
  • Window titles
  • Find and Identify
  • Focus hotkeys
  • Intro skip
  • Cube recipes
  • Runewords
  • System tray
  • Game options
  • Performance mod (lowHD)
  • Lighter game settings for alts
  • Updates
  • Groups and launch order
  • Shortcuts and command line
  • Window layouts
  • Portable mode
• Coming from D2RML?
• How it works
• Security and privacy
• Requirements
• Getting started
• Settings reference
• FAQ
• Troubleshooting
• Roadmap
• Community and support
• Disclaimer

Diablo II: Resurrected is built to run one copy at a time, and every launch normally means going through Battle.net. If you play with more than one account (a magic-find character, a Battle Orders barbarian, a mule, a friend's rush) that gets old fast:

• Add an account by logging in on Battle.net's real login page, shown inside MythosLoader. Authenticator and e-mail codes work exactly like they do in your browser.
• Prefer your own browser? Log in there and paste the address from the address bar instead.
• MythosLoader keeps the login, not your password, and encrypts it for your Windows user.
• Log in once. The login is saved the moment you add it and is used for every launch. If the game ever hands back a newer one, MythosLoader saves that automatically.
• Every account shows its region, its login (Saved until a launch has logged in with it, then Confirmed, and it stays confirmed) and its status (Running, Closed, …).
• If a login stops working, right-click the loader and choose Log in again.
• See a saved login: right-click the loader, Launch options, then Show or Copy under Saved login. It stays hidden until you ask, and a copy is kept out of clipboard history and cleared after 30 seconds.

Diablo II: Resurrected normally refuses to start a second copy. MythosLoader takes care of that by itself on every launch. There's nothing extra to download and no command windows popping up.

• Launch one account, the ones you ticked, a group, or all of them.
• All games load at the same time. Then they sign in one by one, in whatever order they reach the title screen, each as soon as the one before it has picked up its login (about a second each). Two accounts are usually in the game in around ten seconds.
• Each game only ever signs in with its own account: the next account's login is handed over only after the previous game has taken its own.
• A progress strip shows what's happening (Launching barb-alt (2 of 3) · waiting for login) with Cancel and Cancel all buttons.
• Clicking launch on an account that's already running brings it to the front instead of starting a second client on the same account. Launch all skips loaders that are already running, also after MythosLoader was closed and opened again.
• (planned) Games started some other way are listed under Other clients, and you can tell MythosLoader which account they belong to.

• ■ Close ▾ closes all games or the ones you ticked in one go, after a Yes/No check. Right-click a loader → Close game closes just that one. Each game is asked to close, exactly like pressing its X, so it shuts down normally.
• If a game closes by itself with an error, its row says Crashed (exit code …), the Activity panel says so and (with notifications on) a tray notification tells you.
• ↻ Relaunch closed appears whenever games have closed since you launched them, crashed or not, and starts them all again with one click.

Every game window can be renamed so it's easy to find in the taskbar, in Alt+Tab and on screen.

• One global template for all accounts, plus a per-account override.
• Live rename: change the template and every running window updates instantly.
• Title keeper: if the game resets its title, MythosLoader puts yours back within a second.
• Keep the game's title per account, for overlays or tools that look for the original title.

Ready-made presets:

D2R: {name}                 →  D2R: sorc-main
[{index}] {label}           →  [1] Blizzard Sorceress
{label} · {region}          →  Blizzard Sorceress · EU
D2R {index} - {name} ({hotkey})  →  D2R 1 - sorc-main (Ctrl+Alt+1)

_{Concept of Identify all: every client is labelled for a few seconds.}

• Find (row button, double-click, tray menu or hotkey) restores the client if it's minimised, brings it to the front and flashes it.
• Identify draws a gold border with the slot number and account name over a client for three seconds. Identify all does it for every running client at once. Minimised clients are listed in a small notification instead.
• The label is drawn over the game window by MythosLoader itself; nothing is added to the game.

Off by default; turn them on in Settings.

• A game gets the lowest free number when it starts; the number is shown next to its status and can be put in its window title with {index} or {hotkey}.
• Bare F-keys are never used: F1 to F8 are your skill keys in game.
• If another program already owns one of the hotkeys, MythosLoader says so in the Activity panel and skips that one.
• A hotkey only ever brings one window to the front. Nothing is sent to the games.

• On by default, with a per-account override (Inherit / On / Off).
• MythosLoader adds a tiny mod, MythosIntroSkip, to the game's mods folder. It only replaces the two start-up videos with empty files, so the game goes straight to the title screen. Your saves, settings and key bindings stay where they are.
• "Press any key to begin" is pressed for you, on that client only and only on its turn to sign in. No key reaches a game after it has signed in, so nothing can land on the character screen.
• A loader that already uses lowHD needs nothing extra (lowHD skips the videos the same way). With another mod (the game takes only one) the videos play, and the title key still comes on its turn.

The Recipes tab lists every Horadric Cube recipe in the game: rune and gem upgrades, sockets, item upgrades, crafting with its fixed mods, rerolls, rings and amulets, repairs, quest items, the Pandemonium Event and Reign of the Warlock.

• Search by anything: a rune (ber), a gem, an item, a mod (frost nova), or a recipe name (hit power).
• Pick a category to narrow the list; the counts show how many recipes each has.
• Every card shows what goes in the cube (with pictures and counts), what comes out, the mods a crafted item always gets, its item level rule, and notes such as Ladder only or Nightmare and Hell only.
• Press the ☆ on a recipe to make it a favourite: favourites are listed first and have their own ★ Favourites group.
• The recipes are read from the game's own cube table and built into MythosLoader, so the tab works offline.

The Runewords tab lists every runeword in the game (99, plus the ones the game never finished if you want to see them).

• Each card shows the runes in socket order with their pictures, the number of sockets, the level needed, the item types it can go in, and its stats (separately for weapons and shields where they differ). It also says where it came from: Patch 1.10, D2R Ladder seasons and so on.
• Search by name, rune (jah), base (shield) or stat (teleport); narrow it down by item type and number of sockets.
• Star runewords to keep them in your ★ Favourites.
• Read from the game's own runeword table and built into MythosLoader, so it works offline.

MythosLoader
├─ Launch ▸           sorc-main · barb-alt · pala-aura · Launch all
├─ Launch group ▸     MF team · Mules
├─ Running ▸          [1] sorc-main · [2] barb-alt        (click to bring to front)
├─ Identify all
├─ Cancel launches    (while launching)
├─ Show MythosLoader
├─ Discord community
├─ Settings
└─ Exit               (your games keep running)

Left-click the tray icon to show or hide MythosLoader. Exiting MythosLoader never closes your games.

Set launch options for all accounts in Settings, then add to them or replace them per account: right-click a loader and choose Launch options. The same menu switches a loader's region (Americas / Europe / Asia) without re-adding it, and replaces its login with a new token.

A live preview shows exactly what each account will launch with. Options that would put login details on the command line are blocked.

Running several clients is heavy. A loader can run with lowHD, a mod by celloboy126 that blocks most game content to greatly reduce memory use and load times, while your other loaders stay at full quality.

• In a loader's Launch options, press Download lowHD (once). MythosLoader downloads the mod (about 14 MB), checks it, and installs it into your game's mods folder. You only do this once.
• After that, switch it per loader: right-click a loader → Performance mod → lowHDfiller, Off (full quality), or Use global setting.
• A loader with its own choice shows a small mod: lowHDfiller or full quality tag in the list.
• The mod's recommended low-graphics settings are added for the mod only, so loaders without the mod keep your normal graphics settings. Existing settings are never overwritten.
• Other mods work too: Install mod from zip… installs any mod you downloaded yourself.

lowHD is not made by us. All credit goes to its author; the original page is on Nexus Mods. If your game is installed under Program Files, Windows may ask you to run MythosLoader as administrator once for the install.

An alt that only stands in town (a Battle Orders barbarian, a mule, an aura paladin) doesn't need full graphics. In a loader's Launch options, under Lighter game settings (this loader only):

• Frame rate limit: your own setting, 30, 60, 90 or 120 fps.
• Lowest graphics: the Low preset with every quality setting at its lowest.

That loader's game starts with these; all your other games keep your own settings. All copies of the game share one settings file, so MythosLoader writes the lighter values just before that game starts and puts your file back as soon as the game has read it (a couple of seconds), before the next game starts. If you quit the alt from its menu (which saves its settings), the lighter values are set back to yours when it closes. If anything is interrupted, MythosLoader repairs it the next time it starts.

• MythosLoader checks for a new release when it starts. When there is one, an ⬇ Update button appears in the title bar.
• One click downloads the new version, verifies it against the release's checksum, replaces the program and restarts it. Your running games are not closed.
• The Check for updates button next to Settings checks on demand. The automatic check can be turned off in Settings.

• Create named groups such as MF team, Rush or Mules; a loader can be in several.
• Right-click a loader → Groups to add it to a group or make a new one.
• Launch a group from the Groups button, the tray menu or the command line. Its loaders start in the order they were added.
• {group} in a title template shows the loader's group.

MythosLoader.exe --launch sorc-main barb-alt   # launch these accounts, in this order
MythosLoader.exe --group "MF team"             # launch a group
MythosLoader.exe --minimized                   # start in the tray

• These work when MythosLoader is not already running.
• (planned) forwarding to an already-open MythosLoader, and Create desktop shortcut.

• ▦ Windows ▾ → Tile on this monitor arranges all running games in a grid on the monitor MythosLoader is on, as big as they fit at the game's 16:9 shape (two side by side, four in a 2×2, …).
• Tile across all monitors spreads them evenly over every monitor.
• Each game opens where it was next time: positions are saved when you tile, with Save window positions, and when you close a game from MythosLoader. Forget saved positions clears them.
• A saved place on a monitor that is no longer there is ignored, and full-screen games are left alone.
• Turn it off in Settings ("Remember each game's window position").

Put an empty file named portable next to MythosLoader.exe and all settings stay in a data folder beside it, handy for a USB stick or a games drive. Saved logins are still tied to your Windows user, so on another PC or user you simply log in again.

MythosLoader is a modern successor to Sunblood's D2RML, which pioneered one-click multi-launching for D2R and stopped working after patch 2.5. Thanks to Sunblood for the original idea.

Import from D2RML (Settings → Coming from D2RML) brings over your loaders and settings in one step. It works for .bin files saved by the same Windows user on the same PC that still hold a login; the rest are listed as skipped. Your old files are left untouched.

sequenceDiagram
    autonumber
    actor You
    participant ML as MythosLoader
    participant BN as Battle.net login page
    participant D2R as Diablo II: Resurrected
    You->>BN: Log in once (password and codes stay on Battle.net)
    BN-->>ML: Login for this account
    ML->>ML: Encrypt and save it for your Windows user
    You->>ML: Launch
    ML->>D2R: Start the game with the saved login
    D2R-->>ML: Logged in
    ML->>ML: Mark the login Confirmed

1. Log in once. You log in on Battle.net's own page. MythosLoader only receives the result of that login, never your password.
2. Saved, encrypted. The login is stored encrypted for your Windows user account.
3. Launch. MythosLoader starts all your games at once, skips the intro, and signs them in one by one, handing each game its own saved login. It names every window as it opens.
4. Confirmed. Once a launch has logged in, the loader's login shows Confirmed and is used again on every launch. If the game hands back a newer login, MythosLoader saves it for you.

What MythosLoader stores (in %LocalAppData%\MythosLoader, or next to the program in portable mode):

What it never does

• Never asks for, sees or stores your Battle.net password.
• Never reads or changes the game's memory, never injects anything into the game, never automates gameplay.
• Never sends one keystroke or click to several clients. Blizzard bans input broadcasting, and MythosLoader has no such feature.
• Never sends your data anywhere. The only network traffic is Battle.net's own login page and a a check of this repository for new releases when MythosLoader starts (you can turn it off), and the lowHD download if you ask for it.

An honest note on encryption. Your saved logins are encrypted for your Windows user, which protects them from other Windows users on the PC and from anyone who copies the files. Like any program, it can't protect them from other software running under your own Windows account, so keep your PC clean.

What it touches on your PC

• Windows 10 (version 1809 or newer) or Windows 11, 64-bit
• Diablo II: Resurrected installed through Battle.net
• Microsoft Edge WebView2 (already part of Windows 11 and up-to-date Windows 10) for the built-in login page
• A Battle.net account per client you want to run, each owning the game
• Enough PC for several clients: every client is a full copy of the game

1. Download MythosLoader-1.2.9-win-x64.zip from the Releases page.
2. Unblock it: right-click the zip → Properties → tick Unblock → OK. This stops the "Windows protected your PC" warning.
3. Unzip it anywhere you like. There's no installer.
4. Run MythosLoader.exe. It finds your game folder automatically (or set it in Settings).
5. Add your accounts. Click ＋ Add account, then paste a login token (US-…, EU-…, KR-…) or log in on the Battle.net page.
6. Launch. Tick your accounts and press Launch selected, or just Launch all.

Verify your download (optional): every release lists SHA-256 checksums in SHA256SUMS.txt.

Get-FileHash .\MythosLoader-1.2.9-win-x64.zip -Algorithm SHA256

Windows warnings. MythosLoader is not code-signed yet, so Windows may warn about it:

• Your browser holds back the download: Edge: … → Keep → Keep anyway. Chrome: Ctrl+J → Keep.
• "Windows protected your PC": click More info → Run anyway (or unblock the zip first, step 2).
• "Smart App Control blocked an app": there is no "Run anyway" for this one. The only way past it is turning Smart App Control off (Windows Security → App & browser control); Windows usually does not let you turn it back on without resetting the PC, so think before you do. Ask on Discord if unsure.
• Antivirus removed the file: check the checksum, then restore it and report the false positive.

_{Shown in the night theme; under a light system theme GitHub shows the light one. Appearance (right column) picks Night or Light for the program itself.}

Per account: label, title template or keep the game's title, hotkey slot, intro skip, launch options (add or replace), performance mod, lighter game settings (frame rate limit, lowest graphics), saved window position, groups.

Still stuck? Ask on Discord and include the lines from the Activity panel. Login data is removed from them automatically.

• Design and planning
• 1.0: saved logins, add from token or Battle.net login, multi-launch, window titles, per-loader launch options, region switch, intro skip
• 1.1: built-in updates, per-loader performance mod (lowHD) with one-click download
• 1.2: system tray, Identify labels, focus hotkeys, groups, title keeper, D2RML import
• 1.2.4–1.2.9: games load at once, cube Recipes and Runewords tabs, favourites, window layouts, close and relaunch after a crash, lighter game settings for alts, the Annihilus charm icon, view a saved login, a light theme
• Next: code-signed builds, first-run wizard, desktop shortcuts, "other clients" list
• Later: light theme, more languages

Want something on this list? Suggest it on Discord.

• Website: d2r.org/loader has the download, the guide and the forum.
• Help, questions and ideas: the D2R Mythos Discord is the fastest way.
• Bugs: open an issue with the bug-report form.
• Security problems: please report privately, see SECURITY.md.
• Release notes: CHANGELOG.md and the Releases page.

MythosLoader is a third-party tool and is not affiliated with, endorsed by or connected to Blizzard Entertainment. Diablo and Battle.net are trademarks or registered trademarks of Blizzard Entertainment, Inc. in the U.S. and other countries. All other trademarks belong to their owners. Using third-party launchers is at your own risk.

MythosLoader is free to use; see LICENSE.md.

_{Made by D2R Mythos for the Diablo II community · discord.com/invite/d2rmythos}