THE CATALYST

Quest

The Catalyst is a main quest in Fallout 76, introduced in the Steel Reign update. It is the final quest in the main Steel Reign questline. Completing this quest unlocks the Steel Brethren achievement/trophy.

From “The Catalyst” on The Fallout Wiki, CC BY-SA 4.0, adapted (formatting).

WHERE

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Fort Atlas · Savage Divide
Vault 96 · Savage Divide
West Tek Research Center · Savage Divide

From the quest's location aliases; a quest that travels may list where it starts.

REWARDS (24)

ITEM	TYPE	CHANCE
Purified Water	Consumable	Always
RadAway	Consumable	Always
Stimpak	Consumable	Always
Fragmentation Grenade	Weapon	21%
Cryogenic Grenade	Weapon	14%
Plasma Grenade	Weapon	14%
Pulse Grenade	Weapon	14%
Baseball Grenade	Weapon	7%
Floater Flamer Grenade	Weapon	7%
Floater Freezer Grenade	Weapon	7%
Floater Gnasher Grenade	Weapon	7%
Molotov Cocktail	Weapon	7%
Fragmentation Mine	Weapon	4%
Pulse Mine	Weapon	4%
Cryo Mine	Weapon	4%
Plasma Mine	Weapon	4%
Plan: MIRV Frag Grenade	Plan	<1%
Plan: Nuka Quantum Grenade	Plan	<1%
Plan: Nuka-Cola Grenade	Plan	<1%
Plan: Cryo Grenade	Plan	<1%
Plan: Cryo Mine	Plan	<1%
Plan: Nuke Mine	Plan	<1%
Plan: Pulse Grenade	Plan	<1%
Plan: Pulse Mine	Plan	<1%

Gameplay Reward records, leveled lists at max level; chances are estimates. Rewards a script hands out aren't listed.