This tutorial is approximately 10% complete, however, PMC has not provided me with a 'preview' option.

Adding multiplayer games is quite a fun way to spruce up your server, regardless of size or type. The rules and basic setup of a blockey arena can be found here. (youtube link)

This tutorial explains how to construct such an arena which is as easy to use as possible, through use of various plugins. An arena operable using redstone alone can be found here, on the minecraft forums.

Basic Setup

The initial construction of a Blockey arena comes straight from the video the game is explained in.
Enclosed within a 23x15 block wall is a grass floored pitch, with a dividing line down the center, and a 5x3 wool 'goal' on each side.


The theme of your arena can be anything you 'd like, but it is advised to create an easily accessible viewing platform and control booth.
Leave an area approximately 10 blocks deep beneath your area, or 30 blocks if you wish to store the scoring mechanisms in that area as well.

Plugins

There are numerous invaluable server plugins which could be used to create such an arena. However, here are the ones I will be using. (Tried and true)
Sections making use of a particular plugin will be denoted as such.
Please note that these are Bukkit plugins

Falsebook

Download FalseBook 0.91
Falsebook's Thread
Falsebook is a rather invaluable plugin, emulating many features of the single player Craftbook mod. For our blockey arena, it will be used to:

• Control the gate
  
• Reset the arena
  
• Visuals/Item disposal (or, if you prefer, 'lightning')
  
• Scoring system, controls, displays
  
• Redstone activated glowstone
  
• Ball dispensing
  

WorldGuard

Download WorldGuard 5.3
WorldGuard's Thread
WorldGuard is not strictly necessary, but is required for many aspects of the game, as well as to protect the game from abuse. Here, it will be used to:

• Control entry to the arena (allows physical entry/exit to the arena to be controlled via a lever in the control booth)
  
• Limit access to control booth (Only the players you designate will be able to operate the various buttons and levers within)
  
• Turn off hunger/damage/mobs/pvp within the area around the arena
  
• Grief protection
  
• Prevent fire damage to various structures
  

WorldEdit

Download WorldEdit 5.0
WorldEdit's Thread
WorldEdit is required for WorldGuard to work, but will also prove invaluable in building the server.

Setup

Each component can be created in several ways. I have attempted to chunk modular portions which can be omitted or modified based on your server's specifications.

Protecting the Arena

Being interrupted by grief is irritating. Making use of the WorldGuard and WorldEdit plugins, protect the area.

1. Select the intended area. You need only select two opposite corners of the cuboid selection (think of a rectangular prism. Select opposite corners) To select points, move to where you wish each position to be, and type //pos1 for the first point and //pos2 for the second. [Alternatively, you may type //wand, and left click the block you wish to be the first position, and right click the block you would like to be the second position]
   
2. To create the region protection, type /rg d [regionname] [playername] (for example, /rg d blockey adeadhead) Within this region protection, only players added to the region will be able to build. To add or remove a player from a region, type /rg addmember [regionname] [playername] (to add) or /rg remmember [regionname] [playername] (to remove)
   

Scoring a Goal

First to construct following the arena's base structure will be the goals. The goals are holes a single block around and three blocks deep.

• Type /rg f [regionname] ice-melt deny. This will prevent blocks of ice that you place from melting, and becoming water. Ice is used due to its properties regarding dropped items.
  
• Replace the block at the bottom of the hole with a block of ice
  
• One block into the arena (toward the center), place a wooden pressure plate. (On the block adjacent to the block of ice)
  
• Surround the block on the opposite side of the ice from the pressure place, and place a block of water.