- 必须是白天 (在上午4:30之后)。
- 必须至少有一名玩家拥有 200 或更高生命值。（如果此条不符合则哥布林战旗将不起作用）
- 在满足生成条件之后，每个白天都有 1/3 几率让哥布林军队首次入侵。
- 后继入侵（首次入侵被打败后）在困难模式开始之前每天都有 1/30 几率发生，之后是 1/60 几率。
平均来说，在困难模式之前，每玩约 12 小时（现实时间）会发生一次哥布林入侵，而在困难模式每玩约 24 小时会发生一次。
When a Goblin invasion is approaching, one of the two following status messages will appear: "一支哥布林军队正从西边逼近！" / "一支哥布林军队正从东边逼近！"
The message repeats a few times (one time on a small- or medium-sized world, and twice on a large-sized world). The direction specified in this message only pertains to the initial wave of Goblins, which spawns at the world's edge and travels to the player's original spawn point. Additional waves spawn immediately near the player's original spawn point, when the player is in that area.
If the message says "west", the initial Goblins will come from the left. If the message says "east", they will arrive from the right. Note that these directions are not related to the apparent motion of the sun and the moon, which, in Terraria, appear to move from left ("west") to right ("east").
When the Goblin Army is about to begin spawning around the player's spawn point, another status message appears: "哥布林军队来了！" and the theme music will switch to the "Goblin Invasion" / "Boss 1" track.
The event is completed when the player defeats all goblins in the army.
- There will be 80 base goblins.
- 每个最大生命值为 200 或更多的玩家都会额外加上 40 个哥布林。
This means that in single player, the army will consist of 120 goblins, while in an 8-player game, with each player having 200 health or more, it will spawn 400 goblins. The maximum number of goblins in an invasion is 10,280 (255 players above 200 health).
When the final wave of goblins is on the screen, the status message "哥布林军队已被打败！" will appear; and goblins will stop spawning. Even after the message is displayed, the event theme will keep playing until the last remaining goblin is dead.
- Goblin Tinkerer: A town NPC that appears randomly, only after at least one Goblin Invasion has been defeated. He initially appears bound in a random area of the cavern layer.
- Dying will not end the invasion or cause any goblins to despawn.
- The invasion will not prevent most other events, so it is possible to fight a Goblin Army and a boss at the same time. A Blood Moon or a Solar Eclipse may begin during a Goblin Invasion, but their related enemies only spawn after the Goblin Army has been defeated.
- Goblin Peons will break doors instead of opening them. If the door belonged to a house containing the player's bed or an NPC, this will cause the spawn point to reset or the NPC to move out, respectively.
- A Goblin Invasion will prevent dead NPCs from respawning for their duration.
- If all the goblins appearing on the screen are killed, the music will switch to normal, the progress bar will vanish and goblins will stop spawning. After about a minute, the invasion will continue again.
- Although it says this event will swarm the world spawn, in reality, it swarms the area nearest to the player as long as NPCs are nearby. Example: If a player is in the Ocean while an invasion event is happening, the invasion will swarm spawn. While if the player has an NPC with a beach-side house at the Ocean, the invasion will swarm that area instead.
- If a Goblin Army invades shortly before summoning the Wall of Flesh and is not dealt with, it will immediately transfer to its Hardmode version after the boss is defeated.
- Once the initial status message pops up, there is no way to prevent the goblins from invading, as leaving the world and coming back will just redisplay the message and the goblins will proceed to invade anyway.
- Piercing items like spears and flails can take out several goblins at once.
- 入侵期间掉落的尖球能有效地击退更多哥布林，因为他们中的大部分都遵循基本的战士 AI 并会无脑地穿过它们。
- Goblin Peons cannot break doors that are already open.
- 电脑版 126.96.36.199： Updated the sprite of all Goblins.
- 电脑版 1.1：
- 3DS版 1.04：Now has its own music.