Sulfur Game Ending: Final Boss, Lore, and Endless Mode

The Sulfur game ending triggers after defeating the Witch beyond the veil, which loops the Priest back to his crashed car outside the Caves while unlocking endless mode and the main menu credits. Finishing the campaign resolves the primary hunt that starts the adventure, resets the world into a continuous time loop, and unlocks post-game dungeon access directly from the church hub.

What Happens in the Sulfur Game Ending?

The ending sequence is a cyclical narrative conclusion that returns the protagonist to the start of the story. After you defeat the Desert Santa in the fifth level of the Desert, you walk past the arena boundaries to reach the veil. Crossing into Beyond the Veil locks out teleportation through the church artifact. As documented on The Amulet wiki page, entering this space leads straight to an untouched version of the Church where the Wise Old Woman reveals her true identity as the Witch.

Defeating the final boss across her clone, mine, sulfur laser, and beast-summoning phases forces her to flee. Once you loot the arena and step outside, you enter your car for a short driving scene. The vehicle crashes into the exact same tree outside the Caves from the prologue. This completes the narrative loop: you retain your progression, the world resets to the beginning of the hunt, and you can run the story path again or stay in the church hub.

What Is the True Nature of the Amulet?

The Amulet is the remnant soul of the Witch bound to the Priest's neck throughout his entire quest. While it poses as an inner conscience and helpful teleport tool to escape dangerous levels, it secretly guides the Father into collecting the Blood of the Earth Mother at regional shrines.

According to lore entries documented on The Amulet wiki page:

"By fully charging the amulet with all of the Blood of the Earth Mother, the Father has successfully rewound time to before the Witch ever perished, and before she burned his church to the ground."

Her original physical body was discarded in a goblin pit during an earlier battle. By utilizing the Father's vengeful drive to restore shrine energy, the artifact rewinds time back to the moment before the church caught fire. This twist explains why the Father drives into the crash tree immediately after the battle: the confrontation resets history rather than permanently destroying the villain.

What Features Unlock After Completing the Ending?

Post-game content in Sulfur centers on infinite horde survival, church hub accessibility, and new progression systems. Players who complete the final encounter receive specific hub alterations:

1. Endless Mode Access: An open basement hatch appears directly next to Arthur in the church hub. Interacting with the hatch costs one stamp to descend into wave-based horde arenas.
2. Direct Boss Access: In update 0.14.4, developers added a large door slightly off to the side in the desert path, allowing players to challenge the final encounter again without running through all preceding desert levels.
3. Menu Roll Credits: Beating the Witch unlocks the staff credits option directly on the main menu.
4. White Pedestal Cube: A mysterious white cube pedestal appears beside the church basement after finishing the game, as noted in discussions on the Steam community hub.

How Does Endless Mode Work After the Ending?

Endless mode is a dedicated survival challenge that replaces standard dungeon crawling with static arenas spanning eight to ten enemy waves per stage. Defeated monsters drop experience shards that prompt card selection menus on level-up. These cards grant permanent run bonuses such as increased maximum health, movement speed boosts, or temporary single-stage modifiers like infinite durability.

If offered cards do not match your build, you can spend card rerolls, use banishments, or take a stamp payout instead. In endless runs, storage chests and merchant shops act as checkpoints. Accessing a vendor inventory or your storage trunk saves the current state of the run, allowing you to secure your gathered resources before descending into harder waves.

Where does this guide's official Sulfur game information come from?

Official details in this guide follow Sulfur game on Steam, which describes the game in its own words.

SULFUR is a modern old-school action-adventure: Outsmart enemies, find treasure, improve weapons, harness powers. Delve deeper, find answers, make it end.

Sulfur game on Steam