For lore information on the Grimm Troupe, see here

The Grimm Troupe is the second of the four free content packs for Hollow Knight, following Hidden Dreams on the 3rd of August, 2017. It was released on the 26th of October, 2017. It is followed by Lifeblood released on the 20th of April, 2018. 

How To Summon The Grimm Troupe

In order to start Quests, the Knight must first travel to the Howling Cliffs and go through two breakable walls (marked by circles). Then find "The corpse of a large bug" by travelling to the end of a short corridor and through another small hidden gap to the room where it lies (marked with an arrow). Then after dream-nailing the corpse the Knight must return to the previous room, where the torch should now be lit. By striking the brazier at the foot of the torch multiple times a small cutscene will trigger showcasing Nightmare Lantern Interlude. Afterwards, the Knight must return to Dirtmouth, where two tents will now have appeared, with the biggest one containing Grimm.

Finishing the ritual and using the Dream Nail on this corpse will give the line: "Master... my role... apart from you... apart from kin. It pains me so." Banishing will cause it to disappear.

Banishment

The first ending is achieved if the Knight chooses to accept's Brumm offer to send the Troupe out of Hallownest and have them never return. Brumm can be found in the Howling Cliffs where the Knight initially lit up the giant torch which summoned the Troupe. After speaking to Brumm he will then jab his staff violently into the brazier damaging it. The Knight then needs to strike the brazier a couple more times until it breaks completely and the screen fades out. After waking up the Grimmchild charm will be gone along with the torch and the "Corpse of a large bug". Returning to Dirtmouth will show that the Troupe has been successfully banished and that there is a new face in town. Nymm who had just shown up looks suspiciously like Brumm and seems to have memories of the Troupe that he can't rid himself of. Talking with him will grant the Carefree Melody charm and sitting on a bench will grant the Banishment achievement sealing this ending.

Ritual

If the Knight chooses to not accept Brumm's offer and instead follow through by delivering three flames to Grimm, they will find him at the far right of his tent past the original arena. He will be in a bat-like sleeping position hanging from the ceiling and his body will pulse with an audible heartbeat. Using the Dream Nail on Grimm sends the Knight into Grimm's Nightmare where Nightmare King Grimm can be fought under the gaze of many Grimmkin Nightmares and The Nightmare's Heart. If he is defeated then he will appear amidst the Heart's middle eye whereas he will dissolve releasing all the flame gathered before fading out. The Knight will then wake up on the ground outside of Dirtmouth where the big tent used to be accompanied by a fully upgraded Grimmchild which marks the successful completion of the Grimm Troupe's Ritual. Despite the Grimmsteeds and the main tent disappearing, Divine will remain behind if the Knight had not yet made all three fragile charms unbreakable.

For more information on updates and changes to the game, see Updates.

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