Goblin Army

The Goblin Army is a random event within the game when goblins will attack a player. The Goblin Army will spawn at a 6.666% (approximately 1 in 15) chance at Dawn if you meet the criteria stated below. After multiple warning messages (occurring every half hour beginning at 6:00 am) the army will appear. The size of the army is based upon the count and health of the players within the game, according to the formula of 100+50x, with x being the number of players with a current of 200 HP or more. So, in single player, the army will consist of 150 goblins, while in a full 8-player game, with each player having 200 HP or more, it will spawn 500.

All Goblins in the invasion will together drop a total of about 8-10 gold

The army will be made up of the following goblins
 * Goblin Peon
 * Goblin Sorcerer
 * Goblin Thief
 * Goblin Warrior

The criteria for a goblin invasion to occur is as follows:
 * You must have at least one person in the game with 200+ current life (NOT maximum).
 * You must not have had an invasion within 7 in-game days.

Interesting notes about goblin invasions
 * There must be no other spawned enemies on screen for the goblins to begin their attack, this was discovered after a long period of leaving the game open with a large pit for zombies. Upon coming back to the game, there were a number of zombies in the pit, and as soon as they were slain a goblin army began assaulting without warning (it is assumed the goblin warnings occurred earlier while away from the keyboard.
 * Goblins spawn in waves of 5, there will never be more than 5 on screen at once. This means if you trap 5 goblins in a hole, it is safe to move around or even go away from the keyboard, as long as the 5 goblins remain on screen at all times.