CivilizationsMC

CivilizationsMC adds a server-side economy to NeoForge 1.21.1. You can form a clan, earn coins by selling to the server, list items on a multi-page auction house, set up your own player shop, and work through a tiered 30-quest ladder. Your balance, clan, and current quest set all show on a per-player sidebar HUD.

Most of the mod runs server-side and uses vanilla container GUIs. The custom shop block is the only piece that renders on the client.

Commands

• /clan create|invite|accept|leave|disband|list
• /balance, /balance give|set (op), /pay <player> <amount>
• /bank opens a withdraw/deposit GUI for paper banknotes
• /ah opens the auction-house GUI. /ah sell|buy|cancel|list|mine also work as direct commands.
• /sell opens the cart GUI. /sell hand and /sell all sell instantly, /sell list opens a paged price catalog.
• /quests shows your active quest set and lets you claim rewards.
• Right-click a placed Shop block. Buyers see a vanilla villager trade screen, owners see a config GUI.

Features

Clans

• Create a clan, invite players, accept invites, leave, disband, see the list of active clans
• Members can still hurt each other in PvP (friendly fire is on by default)

Currency and Bank

• Per-player coin balance stored with the world
• /pay for peer-to-peer transfers
• /bank lets you withdraw your balance as paper banknotes and deposit them back. Banknotes are vanilla paper with custom data so any client can read them.

Auction House

• Vanilla 6-row chest GUI with Browse, Sell, My Listings, and Returns pages, plus a 3-row Confirm Cancel modal
• Browse sort cycle (Newest, Price low to high, Price high to low) with right-click to go backwards
• Each listing's lore shows the price, seller, an expiry countdown, and a colored call-to-action line
• 5% listing tax and 10% sale tax act as money sinks
• 48-hour listing expiry. Expired items go straight to Returns and you can claim them whenever.
• Enchantments, custom names, and custom_data survive a listing round-trip

Player Shops

• Custom Shop block crafted from 6 planks and an emerald, with its own model and texture
• Has a HORIZONTAL_FACING blockstate so the front of the block always points at whoever placed it
• First right-click claims ownership
• Owners get a chest-style config GUI for adding and removing offers, setting prices with step buttons, and depositing stock from their inventory
• Buyers get the vanilla villager trade screen. Payment comes out of /balance and splits 90% to the owner, 10% to a sink.

Server Sell-Shop (the money faucet)

• /sell opens a cart GUI. Click an item in your inventory to add it to the cart, click Sell to open the confirm modal, click Confirm to mint the coins.
• /sell hand and /sell all for fast sales without the GUI
• /sell list opens a paged catalog showing every sellable item and its price
• Around 80 items in the price list. Rare and non-farmable items (diamond, netherite, beacon, dragon head, and so on) pay well. Farmable items pay 1 coin.

Quests

• 30 quests in 6 tiers of 5. Finish all 5 in your current set and the next set unlocks.
• Sell, list, and buy quests use lifetime counters, so your progress carries over between sets
• Click a completed quest in /quests to claim its coin reward

Sidebar HUD

• Per-player scoreboard sidebar showing your Balance, your Clan, and your active quest set with live progress
• Refreshes about every two seconds and uses vanilla scoreboard packets

Polish

• Every system message uses a colored prefix: CLANS | ..., ECONOMY | ..., BANK | ..., AUCTION | ..., SHOP | ..., QUESTS | ...
• Hover any sellable item anywhere in the game and the tooltip shows Sells for: X coins
• Network version check rejects clients running the wrong mod version at the handshake

Anti-Dupe Protection

• All display containers are read-only at the Container level. setItem, removeItem, removeItemNoUpdate, and clearContent all refuse external writes.
• Every display item is stamped with a hidden marker. Any marked item that lands in a player inventory, on the cursor, or as a dropped ItemEntity gets deleted within a single server tick.
• Stops inventory extract/sort mods (Quark's Inventory Sorting buttons, Sophisticated Backpacks' Pickup upgrades, and so on) from pulling items out of the GUIs

Requirements

• Minecraft 1.21.1
• NeoForge 21.1.230 or newer
• Java 21
• Required on both the server and the client (custom block and version check)

Clans

• Create and run a clan, invite/accept/leave/disband
• Members are friends in chat-prefix style but can damage each other (friendly fire is ON by default)

Currency and Bank

• Per-player long-integer coin balance, persisted in the world save
• /pay peer-to-peer transfers
• /bank GUI for withdrawing paper banknotes (item-based currency) and depositing them back; works on any vanilla client because banknotes are just paper with custom data

Auction House

• Vanilla 6-row chest GUI with Browse / Sell / My Listings / Returns pages and a 3-row Confirm Cancel modal
• Browse sort cycle (Newest / Price low→high / Price high→low) with right-click to go backwards
• Per-item lore shows price, seller, expiry countdown, and a colored call-to-action
• 5% listing tax + 10% sale tax (configurable money sinks)
• 48-hour listing expiry — expired items automatically go to Returns, claim them anytime
• Preserves enchantments, custom names, and custom_data end-to-end

Player Shops (custom block)

• Custom Shop block (crafted with 6 planks + an emerald) with its own model, texture, and HORIZONTAL_FACING so the storefront always faces the placer
• First right-click claims ownership
• Owners get a chest-style config GUI: add/remove offers, set prices with step buttons, deposit stock from inventory
• Buyers get the vanilla villager trade screen — pays from /balance, splits 90 % to the owner / 10 % sink

Server Sell-Shop (the money faucet)

• /sell opens a cart GUI: click inventory items to add them to the sale, Sell opens a confirm modal, Confirm mints coins
• /sell hand and /sell all for quick sales
• /sell list paged price catalog of every sellable item
• ~80-item curated price list — rare/non-farmable items pay well (diamond, netherite, beacon, dragon head, etc.), farmable items pay 1 coin

Quests

• 30 quests across 6 tiers (Sets 1–6 of 5 quests each) — finish all 5 in your current set to auto-unlock the next
• Lifetime counters for selling, listing, and buying so progress carries across tiers
• Click a completed quest in /quests to claim its coin reward

Sidebar HUD

• Per-player scoreboard sidebar showing Balance, your Clan, and your current quest set with live progress
• Refreshes every 2 seconds; sent via vanilla scoreboard packets

Polish

• Every chat message goes through a unified prefix system: CLANS | …, ECONOMY | …, BANK | …, AUCTION | …, SHOP | …, QUESTS | …, each with its own color
• Price tooltips: hover any sellable item anywhere and see Sells for: X coins
• Network version check — clients on the wrong mod version are rejected at the handshake

Anti-Dupe Protection

• All display containers are read-only at the Container level — setItem, removeItem, removeItemNoUpdate, and clearContent all refuse external writes
• Display items are stamped with a hidden marker; any marked item that lands in a player inventory, on the cursor, or as a dropped ItemEntity is deleted within one tick
• Designed to defeat extract/sort mods like Quark's Inventory Sorting and Sophisticated Backpacks' Pickup upgrades

Requirements

• Minecraft 1.21.1
• NeoForge 21.1.230 or newer
• Java 21
• Required on both server and client (custom block + version check)