Where it sitsChapter 1 (Storming the Castle) is the four-boss Demo 1 arc that follows the Prologue
Per Miraheze's chapter index, Chapter 1 (Storming the Castle) is the first numbered chapter, gated behind the Prologue (Hello World) and the Red & Blue Noob minibosses at Roblox HQ. The chapter starts after the player exits Roblox HQ into the Meadows and ends with the Cruel King fight in the Blackrock Castle throne room. It is the chapter that introduces the Bombs item (picked up from Jim the Accountant next to Tutorial Terry), the Snowy Thicket forced-encounter pattern (Banished Knight, Spiky Killbot), the Blackrock Castle skip via Dynamite, and the Cruel King Scepter Strike + Refreshing Heal loop that defines the chapter's mid-boss pacing. Blackrock King returns as a voluntary Demo 5 rematch once the chapter wraps, and is a separate encounter from Cruel King DX even though the body is reused. Plan the build to cover the four-boss arc in one go - the chapter does not let the player respec between the Caves exit and the Cruel King throne room.
Boss chainSupreme Ant -> Banished Knight -> Spiky Killbot -> Sentient Statue -> Cruel King -> Blackrock King (Demo 5 rematch)
The verified Chapter 1 boss order is Supreme Ant (Caves exit with HP 10 and the Ant Army Call for Help summon, the canonical 'first real boss' wall that defines Chapter 1 pacing), Banished Knight (Snowy Thicket forced encounter with the Launcher-replaces-Ball AOE and Free Poison stacks), Spiky Killbot (Snowy Thicket bomb-required boss with the spike armor contact-reflection and the charge ram, gated behind the Bombs item from the Prologue), Sentient Statue (Blackrock Castle hallway boss with the Statue Smash multi-hit and the back-zoom animation, optional via Dynamite skip on the dungeon entrance), Cruel King (chapter final boss in the Blackrock Castle throne room with the Scepter Strike opener + Refreshing Heal DEF Up loop and the icy mist AOE), and Blackrock King as the voluntary Demo 5 rematch at the Chapter 1 ending area for the Call: Blackrock King card. All bosses have dedicated prep pages linked from this site, and the Caves + Snowy Thicket builds feed directly into the Blackrock Castle throne room.
Snowy Thicket pathBanished Knight + Spiky Killbot as the forced-encounter duo with Bombs as the universal unlock
The Snowy Thicket is the second Chapter 1 zone and gates access to Roadtown via two forced encounters: Banished Knight (the Launcher-replaces-Ball AOE that applies DEF Down for 3 turns while dealing Attack-1 damage to adjacent adds, plus Free Poison LV1 stacks for 3 turns) and Spiky Killbot (the spike armor contact-reflection boss that requires Bombs, Mr Batty, or Storm Tea to break his armor without triggering the reflection damage). The canonical Chapter 1 unlock is Bombs from Jim the Accountant next to Tutorial Terry in the Prologue - without Bombs, Spiky Killbot's spike armor cannot be broken in time and the encounter becomes a guaranteed loss. Plan the Snowy Thicket build so the Bombs item is in the inventory before entering, and bring one poison-cleanse card for Banished Knight's Free Poison stacks. The Pit Floor 16 Banished Knight and Floor 18 Spiky Killbot rematches tighten the encounter windows, which is what makes the Bombs item the single most-cited Chapter 1 unlock in Reddit threads.