ATM10 Player Guide

Player setup · checked August 19, 2026

Get into All the Mods 10.

From an empty desktop to a server-ready ATM10 client. Choose the easy Prism Launcher route, or build the installation yourself with the official Minecraft Launcher.

Use Prism Launcher Install manually

Before you start

Three things to check

01

Own Java Edition

Use the Microsoft account that owns Minecraft: Java Edition. Bedrock-only accounts cannot join Java servers.

Minecraft for PC
02

Have enough memory

ATM recommends at least 16 GB system RAM. Give Minecraft 8 GB to start; 10–12 GB can help on a 32 GB system.

ATM requirements
03

Match the server

This guide targets ATM10 8.0. Ask the server owner before choosing “latest”—latest may change after this guide is published.

All ATM10 files
01

Recommended path

Install with Prism Launcher

Prism keeps ATM10 separate from vanilla Minecraft and downloads the correct Minecraft, NeoForge, mods, and pack configuration for you.

Best for almost everyone

Expect roughly 15–30 minutes, mostly downloads and the first launch. You do not need to install NeoForge or each mod yourself.

1

Download & install

Install Prism Launcher

  1. Open the official Prism Launcher download page. Avoid download mirrors and sponsored search results.
  2. Choose your operating system:
    • Windows 10/11: download the x86-64 installer unless you know your PC is ARM64. Open the .exe and follow the installer.
    • macOS: choose Apple Silicon for M1/M2/M3/M4/M5 Macs, or Intel for older Macs. Open the download and move Prism Launcher to Applications.
    • Linux: the official Flatpak is the simplest option and includes Java. Distribution packages and AppImages are also available.
  3. Launch Prism. In the first-run wizard, choose your language and leave the paths at their defaults unless you have a specific reason to change them.
  4. On the Java page, enable Autodetect Java version and Auto-download Mojang Java when offered. Prism 9.0 and newer can choose the correct runtime automatically.
↧Download PrismOfficial downloads JJava helpPrism documentation
2

Authenticate

Add your Microsoft account

  1. In Prism’s top-right corner, click the account/profile button. If you do not see it, open Settings → Accounts.
  2. Choose Manage Accounts… → Add Microsoft.
  3. Prism opens a Microsoft sign-in page or shows a short device code. Sign in through the Microsoft page and enter the code if asked.
  4. Use the Microsoft account that owns Minecraft: Java Edition, then approve the sign-in. Return to Prism and wait for your Minecraft username and skin to appear.
  5. Select the account and choose Set Default if Prism did not do so automatically.
Your password stays with Microsoft

Only enter Microsoft credentials on a Microsoft-owned sign-in page. Prism uses Microsoft’s browser authorization flow; never paste your password into a modpack or server website.

3

Create the instance

Find and install ATM10

  1. From Prism’s main window, click Add Instance in the top-left.
  2. Select CurseForge in the left sidebar. Search for All the Mods 10.
  3. Select All the Mods 10 — ATM10 by ATMTeam. Do not choose ATM10 Lite, To the Sky, All the Mods 9, or a community copy.
  4. Open the version selector and choose 8.0 to match this server. Confirm that it says Minecraft 1.21.1.
  5. Click OK. Prism will create an isolated instance and download the pack.
  6. If Prism opens a blocked or manual downloads window, follow each supplied CurseForge link, download the requested file, and return to Prism. Prism should detect the files. Do not skip any item.
AATM10 8.0Official pack file ?Pack helpPrism documentation
4

Tune & launch

Set memory, then play

  1. Right-click the new ATM10 instance and choose Edit → Settings → Java.
  2. Enable the instance-specific memory checkbox. Set Maximum memory allocation using this table:
Your PCSet maximum toUse
16 GB RAM8192 MiBGood starting point
24 GB RAM10240 MiBMore headroom
32+ GB RAM10240–12288 MiBHeavy worlds / shaders
  1. Confirm the Java runtime shows version 21. Use Auto-Detect… or the Java wizard if it does not.
  2. Close the editor and double-click the ATM10 instance. The first launch can sit on one screen for several minutes; let it finish.
  3. At the Minecraft title screen, choose Multiplayer → Add Server, enter the server address supplied by the owner, then join.

Do not allocate all system RAM. Windows/macOS/Linux and background applications need memory too. Adding excessive RAM can make pauses worse.

02

Advanced path

Manual install with the official launcher

This route uses Mojang’s official Minecraft Launcher and no modpack launcher. You install NeoForge, every required mod file, and the pack’s configuration yourself.

Know what “manual” means here

The ATM10 client ZIP is a CurseForge manifest, not a ready-to-play folder. Version 8.0 lists 485 project dependencies. Most mod JARs are intentionally not bundled, so you must download every exact file named by manifest.json. This can take hours and is easy to get wrong. The server ZIP is not a substitute—it omits client-only content.

1

Foundation

Install Minecraft and Java 21

  1. Download and install the official Minecraft Launcher. Open it and sign in with the Microsoft account that owns Java Edition.
  2. In the launcher, select Minecraft: Java Edition → Installations → New installation. Choose vanilla release 1.21.1, save, and play it once. When the main menu appears, quit the game.
  3. Install a 64-bit Java 21 JDK from Eclipse Temurin. Java bundled inside the Minecraft Launcher is not always available to an external NeoForge installer.
  4. Verify Java in Command Prompt or Terminal:
java -version

The first line must begin with something like openjdk version "21. If the command is missing or reports another major version, fix Java before continuing.

2

Loader

Install the exact NeoForge version

  1. Close the Minecraft Launcher completely.
  2. Download the NeoForge 21.1.247 installer from the official NeoForged website. The exact installer is also available from NeoForged’s Maven repository.
  3. Open the downloaded .jar. If double-clicking does nothing, open a terminal in the Downloads folder and run:
java -jar neoforge-21.1.247-installer.jar
  1. Select Install client, keep the normal Minecraft directory selected, and click Proceed.
  2. Create an empty folder named ATM10-8.0 somewhere easy to find, such as Documents or Games. This will be the isolated game directory.
  3. Open the Minecraft Launcher. Go to Installations → New installation, name it ATM10 8.0, choose release neoforge-21.1.247, and set Game Directory to your new ATM10-8.0 folder.
  4. Under More Options, change only the existing -Xmx2G portion of JVM Arguments to -Xmx8G. Keep the other arguments intact. Save and launch this profile once, then quit at the title screen.

If the profile is missing, reopen the NeoForge installer and confirm it completed successfully. Do not choose “latest NeoForge”; ATM10 8.0 specifically declares 21.1.247.

3

Pack files

Read the manifest and collect every mod

  1. Download the All the Mods 10-8.0 client ZIP. On the file page, use the normal Download button. Do not download ServerFiles-8.0.zip.
  2. Extract the ZIP into a temporary folder. At its top level you should see manifest.json and an overrides folder.
  3. Open manifest.json in a text editor. Under minecraft.modLoaders, confirm NeoForge 21.1.247. Under files, each entry supplies a CurseForge projectID, exact fileID, and whether it is required.
  4. Use the pack’s Dependencies page to open each project. In that project’s Files tab, download the file whose numeric file ID matches the manifest. Confirm it is the NeoForge/Minecraft 1.21.1 file—not a Fabric, Forge, or newer-Minecraft build.
  5. Put every required downloaded .jar directly inside ATM10-8.0/mods. Do not extract mod JARs and do not leave them inside nested folders.
  6. Repeat until every "required": true manifest entry is present. Include optional entries only if you intentionally want them and the server permits them.
manifest.json{ projectID, fileID }
CurseForge projectmatching file ID
Game directorymods/name.jar
Do not “pick the newest” mod file

ATM10 pins tested versions. A newer individual mod can change dependencies, reject the server, corrupt a world, or crash. Match the manifest’s file ID exactly and download only from CurseForge, Modrinth, or the author’s official site.

4

Configuration

Apply the ATM10 overrides

  1. Open the extracted client ZIP’s overrides folder.
  2. Copy the contents inside overrides into your ATM10-8.0 game directory. Merge folders when asked. The result should look like ATM10-8.0/config, ATM10-8.0/kubejs, and so on—not ATM10-8.0/overrides/config.
  3. If overrides/mods contains permitted third-party files, merge those into the same top-level mods folder. Do not overwrite a file with an unrelated version.
  4. Keep the original ZIP and manifest until the installation works; they are your version record.
  5. Start the ATM10 8.0 installation in the official launcher. Wait patiently during its first full load, then use Multiplayer → Add Server.

ATM10-8.0/

├── config/

├── defaultconfigs/

├── kubejs/

├── mods/ ← all exact JAR files

├── resourcepacks/

└── saves/

5

Optional additions

Add resource packs, data packs, or shaders

Resource packs

Resource packs change client visuals and sounds. In Prism, right-click ATM10 and choose Folder; manually, open your ATM10-8.0 game directory. Put compatible pack ZIPs in resourcepacks, then enable them under Options → Resource Packs.

Data packs

Data packs change world rules, recipes, or generation. Back up the world, then place compatible pack ZIPs in saves/<world name>/datapacks. For multiplayer, the server owner installs them in the server world; ordinary players usually install nothing.

Use content made for Minecraft 1.21.1 and check for ATM10 conflicts. Leave ZIPs compressed unless their author specifically says to extract them. Custom additions may put you outside official pack support.

Shaders with Iris

Add lighting, shadows, and atmosphere

ATM10 already includes Sodium for rendering performance and Iris for shader support. You only need a shader pack—do not add OptiFine, Oculus, or another copy of Sodium/Iris.

  1. Download an Iris-compatible shader pack from a trusted source such as Modrinth’s shader directory or CurseForge Shaders. Check its description for Minecraft 1.21.1 or Iris compatibility.
  2. Leave the shader pack as a .zip. Do not extract it unless its author specifically instructs you to.
  3. Launch ATM10 and open Options → Video Settings → Shader Packs. Choose Open Shader Pack Folder. You can also open the instance folder yourself and use its shaderpacks directory.
  4. Move the shader ZIP into that folder, return to Minecraft, and select it from the list. Use Refresh if it does not appear, then click Apply or Done.
  5. Begin with the shader’s Low or Medium profile. If performance is poor, reduce shadow quality, render distance, and shader-specific effects—or switch shaders off from the same menu.

Prism pathRight-click ATM10 → Folder → shaderpacks

Manual pathATM10-8.0/shaderpacks

Shaders are client-only and GPU-heavy

The server does not need the shader pack, and players can use different shaders. More allocated RAM will not compensate for a slow graphics card. If the Shader Packs button is missing, repair the ATM10 instance or verify Iris is enabled instead of installing a second copy.

Iris compatibility and documentation

6

When it does not launch

Check these first

“Incompatible mod set” or server rejects me

Confirm the client is ATM10 8.0, Minecraft 1.21.1, and NeoForge 21.1.247. In a manual install, compare every JAR against the manifest. Do not update individual mods.

Exit code 1 or a crash during startup

Exit code 1 is only a generic failure. Check that Java is 64-bit version 21 and memory is at least 8192 MiB. In Prism, use Edit → Other → Minecraft Log; manually, inspect ATM10-8.0/logs/latest.log and debug.log.

Prism says files are missing

Complete every link in Prism’s manual-download window, keep the filenames unchanged, and let Prism detect them. If a browser extension blocks the download, allow CurseForge downloads temporarily and retry.

The game freezes or the computer becomes unresponsive

Close memory-heavy apps, begin with 8 GB allocated, and lower render distance. Never give Minecraft all installed RAM. Update graphics drivers from AMD, Intel, or NVIDIA rather than third-party driver sites.

ATM10 issue tracker Prism troubleshooting NeoForge FAQ