NHC

Supported server-side:

• Armor Poser - Allows you to shift-click on an armor stand to configure it's pose.
• Cape Command - Adds a /cape command to Minecraft, which allows you to use any cape you want.
• MiniHUD - A "mini F3" HUD, supported via Servux. Toggleable press F6 and customizable. press F8
• Shulker+ - Label Shulker boxes with an item dynamically rendered as an item frame on top.
• Simple Voice Chat - A working (proximity) voice chat in Minecraft! With addon support. press V
• Status - Set a status. "Player does not want you to sleep" etc. press U

Useful for SMP / events:

• Better Statistics Screen - Better statistics screen.
• Bobby - Allows for render distances greater than the server's view-distance.
• Freecam (Modrinth Edition) - Take screenshots or position Litematica schematics. press F4
• Litematica - Easily bring your creations to the server. press F12 (default "tool" is minecraft:echo_shard)
• More Chat History - Increases the maximum length of chat history.
• PictureSign - Use signs to display pictures and videos from the web. off by default use mod menu
• Remove Reloading Screen - Makes resource packs load in the background.
• Yet Another Bingo - A Bingo/Lockout mod used during events. Has extra utility when on the client.
• Zoomglass - Use a spyglass quickly, with a press of a button! A vanilla friendly zoom alternative. press Z

Aesthetic:

• BetterF3 - Makes the debug HUD more human-readable. press F3
• Chat Heads - Player heads in the chat box. See who you're chatting with!
• Iris Shaders - A shader pack loader. press F9 to toggle, press F10 for settings.
• LambDynamicLights - Adds dynamic lights.
• Model Gap Fix - Fixes gaps in Block Models and Item Models.
• Paginated Advancements & Custom Frames - Better advancements screen.
• Seamless - Connected outlines for Double Blocks like Beds and Doors!
• Sodium Extra - A Sodium addon that adds various toggles and tweaks.

Tooltip / HUD:

• AppleSkin - Food/hunger-related tooltips.
• Better Mount HUD - Shows your hunger while riding a mount.
• Durability Tooltip - Durability tooltip without F3+H.
• FuelInfo - Extended info for your fuel! Simply hover above progress arrows, flame icons and fuel gauges.
• Map Tooltip - View maps from your inventory.
• Raised - Raises the hotbar so the selector is not cut off!
• Scoreboard Overhaul - An improved, cuter, and non-invasive scoreboard sidebar UI redesign for events.
• Shulker Box Tooltip - View the contents of shulker boxes from your inventory.
• Status Effect Bars - An overlay to show the remaining duration of effects.

Animations / Particles:

• Cake Chomps - Adds sound and crumb particles when you eat cake.
• Eating Animation - A mod that adds sprite animations for edible and drinkable items.
• Falling Leaves - Adds a neat little particle effect to leaf blocks for more leaf types.
• Make Bubbles Pop - Mod that makes bubble particles pop.
• Not Enough Animations - Bringing first-person animations to the third-person.
• Visuality - Little visual improvements by adding subtle new particles.
• Satin Free Wakes - Adds splashes and wakes while traveling on water.

Resource Packs:

• Axolotl Bucket Variants - Shows the axolotl variant in buckets. (CIT)
• Enchanted Books from Mars - Changes textures of enchanted books for better clarity. (CIT)
• Fast Better Grass - Makes grass and related blocks use the top texture on the sides. off by default.
• Fresh Animations - Make your game like the trailers! Dynamic animated entities. (EMF) off by default
• In-Game Brewing Guide - Easily brew potions within the "Brewing Stand" UI.
• No Z-Fighting - Fixes many of those annoying flickering glitches.
• Recolourful Containers GUI + HUD - Immersive, interesting and colourful GUIs. (OptiGUI) off by default
• Señor Bumbo Cacteeni - by ShamanDorn on PlanetMinecraft but updated/fixed.

Shader Packs:

• Complementary Shaders - Reimagined - Preserving the elements of Minecraft with exceptional quality, detail, and performance. (Iris) press F9 to toggle. off by default
• Mellow - A painterly aesthetic. It's easy on your eyes and on your computer! (Iris) press F10 for settings. off by default

Mods:

• 1.21 Moddermore list
• 1.21.1 Moddermore list

Resources:

• Devin's Badges
• Differentunic
• Frogrinth Badges
• Moddermore
• Shields.io

Tools:

• PackSquash is a Minecraft: Java Edition resource and data pack optimizer which aims to achieve the best possible compression, performance, and protection, improving pack distribution, storage, and in-game load times.
• packwiz is a command line tool for creating Minecraft modpacks. Instead of managing JAR files directly, packwiz creates TOML metadata files which can be easily version-controlled and shared with git (see an example pack here)
• Parse Minecraft Log. Paste in the log file. Parse Log.

Modrinth

You can create and play Modrinth modpacks using the Modrinth App.

To play a Modrinth modpack using the app, click the Browse button on the left side of the launcher.
Click the search bar and search NHC. Then, click Install and wait for the modpack to be installed.
To play, click Jump back in at the top or Library button on the left side of the launcher.

If you downloaded a .mrpack file, you can import the modpack instead.

To import a Modrinth modpack using the app, click the "Create profile" button on the left side of the launcher.
Click From File then, click Import from file and locate the file. Then, click Open.
Wait for the modpack to be installed. To play, click Jump back in or Library button on the left side of the launcher.
Finally, hover your cursor over the modpack and click the green Play button.

Prism or MultiMC

You need Java 21 to play the game.

Alternatively, you could use Prism Launcher or MultiMC.

To play a modpack using Prism or MultiMC, click the Add Instance button in the top left of the launcher.
Click the Modrinth tab on left. Click the search bar and search NHC.
Then, click OK and wait for the modpack to be installed. To play, double click the modpack icon.

Or import the .mrpack file / CurseForge .zip file

To import, simply drag the file onto the Launcher and click OK.
Or click the Add Instance button at the top of the launcher. Click the Import tab on left and locate the file.
Then, click OK and wait for the modpack to be installed. To play, double click the modpack icon.

How to Download Prism Launcher and install Java 21.

Blog: Setting up the Prism launcher: why and how to do it. by ShelLuser.
Wiki: Prism Launcher Wiki. (Official)
Video: How to Use Prism Launcher (Tutorial). by BillyDaBongo.

Default Key Binds

Options... > Controls... > Key Binds...
Identical to vanilla Minecraft with some additional key binds:

Inventory

• Zoom - Z (requires you to have a Spyglass in your inventory, thanks to Zoomglass)

Miscellaneous

• Open Status GUI - U - Allows you set a status which can be seen in the player list. hold TAB

Freecam

• Toggle Freecam - F4 - Come out of your body and fly around. (with limitations)

Voice Chat
press V to set up Simple Voice Chat! (Client Setup)

• Disable Voice Chat - N
• Hide Voice Icons - H
• Mute Microphone - M
• Push to Talk - Not bound
• Voice Chat GUI - V
• Voice Chat Group - G Everything can be configured through the V menu

Iris

• Shader Pack Selection Screen - F10
• Toggle Shaders - F9 off by default

PictureSign

• Copy Text from Sign - Not bound by default

Scoreboard Overhaul

• Show / Expand Scoreboard - Not bound by default

Yet Another Bingo

• View Bingo Card - Not bound by default

Keys not listed in key binds

• Toggle MiniHUD - F6
• Toggle Light Level Overlay - F7
• Open MiniHUD GUI - F8
• Open Litematica GUI - F12

Settings

Some minor default options have been included for convenience. See them here.
The Video Settings... screen has been expanded. (thanks to Reese's Sodium Options and it's dependencies)
Mods can be easily configured in-game by clicking the Mods button and double clicking the mod. (thanks to Mod Menu)

How to use Shaders?

Video: Section of How To Download & Install Iris Shaders by The Breakdown.

Options... > Video Settings... > Shader Packs... or press F10 in game.
Click the shader pack you want to use then click done.
You can "+Drag and Drop Shader Packs to add" them to the client in the Shaderpack Selection Screen.

Complementary Shaders - Reimagined and Mellow are off by default.
Both come with slightly tweaked settings based on "potato" settings, though it's recommended to play around with Shader Pack Settings... to suit your tastes.

How to use Litematica?

Wiki: See Litematica GitHub Wiki by masa.
Video How to use MiniHud and Litematica by LogicalGeekBoy.
Video: How To Use Litematica | Minecraft 1.21 Tutorial by SaminUP.

The default main menu hotkey is F12 instead of M.
The default toolItem is minecraft:echo_shard instead of minecraft:stick.

What can MiniHUD do?

Good amount of info on the CurseForge page.
Video How to use MiniHud and Litematica by LogicalGeekBoy.

On the SMP server, type /seed to see slime chunks.

The default main menu hotkey is F8 instead of H + C.
The default toggle hotkey is F6 instead of H. Toggle the Light Level Overlay with F7 by default.

Default

• player coordinates.
• the direction you're facing.
• horse speed. (while looking at or riding a horse)
• horse jump height. (while looking at or riding a horse)

Everything can be configured from the in-game config menu.

PictureSign?

Wiki How to use Picture Sign.
Video (teaser) Watch videos in Minecraft.

This mod allows you to participate with Deepslate Cinemas and gives extra functionality during other events.

Impressive but easily obtrusive. It has been turned off by default to prevent this.
To make use of this mod for special occasions, change the following settings using Mod Menu:
(ESC) > Mods > PictureSign
Enable Pictures > Yes
Enable Multimedia > Yes

How to Download Prism Launcher and install Java 21.

Blog: Setting up the Prism launcher: why and how to do it. by ShelLuser.
Wiki: Prism Launcher Wiki. (Official)
Video: How to Use Prism Launcher (Tutorial). by BillyDaBongo.