Grist Missions & Bosses

01Unlock order

NamingThe developer's announcement is titled "Mission 3: DEFRAG". This wiki has not found a published name for the opening program, so it is called the "first program" here, as in the official post. Because DEFRAG is "Mission 3", Death In Green is at least the fourth; a hotfix also mentions a Data Corruption program.DEFRAG0.0291

02First program

The launch scenario is a roguelike tower. Levels are generated procedurally and get harder as you progress, and a run can reach the final star cluster and beat the scenario.Steam

Two fights were already in the game at launch, since they were rebalanced a week later in 0.4.02. The patch notes do not say which program each belongs to.0.4.02

• Boss: Nightmare Slurry.
• Fight: Sentinel Program and its allies.
• Assassination missions grant a Boon when completed.0.4.02
• Objectives on later floors: a spawning bug was fixed in 0.4.023.0.4.023

03DEFRAG

To play it, select the "DEFRAG" program, which unlocks after you complete the first program. It brings a new boss fight and new location types.DEFRAG

• New character mods as rewards from Weapons Cache locations.0.4.026
• New weapons and consumables in Megamart shops, and more ammunition types.0.4.026
• New items from exploring, shops and sidequests.DEFRAG
• Field Inventory items can now be used in combat.DEFRAG
• DEFRAG introduced new environments, which the Greensward update later expanded.Beta

UnverifiedThe DEFRAG announcement does not name its new boss. If you have beaten it, the developer's Discord is the best place to confirm details.

04Death In Green (Greensward)

Update 0.4.041 "Greensward" (27 Oct 2026) adds the mission "Death In Green". It expands the Gardens of Atropos floors with new locations, events, enemies and items. You must complete DEFRAG first.0.4.041Greensward

• Forest environments, a unique boss fight, new enemies and items.Beta
• Grist is no longer split between your total and what you earn in a mission, which makes in-mission shopping easier.Beta
• The update was tested on the public beta branch from 19 Sep 2026. Beta saves may not carry over to the stable branch.Beta

05Bosses

Grist has "a growing pool of brutal bosses each with their own unique strengths and weaknesses".Steam Here is what the official patch notes confirm.

Nightmare Slurry

Sentinel Program

• Fought together with allies. Their HP values were adjusted in 0.4.02, and defeating it now grants XP.0.4.02
• Its damage reduction is displayed in the fight, and its sprite position was corrected in 0.4.029.0.4.029

Ballista

0.4.027 fixed a bug that made you fight a 0 HP ballista again after defeating it once.0.4.027

DEFRAG and Greensward bosses

Both updates add a new boss fight.DEFRAGBeta Neither announcement names it, so this wiki does not list unconfirmed names. Since 0.4.026b, beaten boss elevators stay cleared.0.4.026b

06Mission types & locations

07What's planned

For the full release, the developer plans:Steam

• More location types, enemies, quest templates, items, crew classes and factions.
• Additional scenarios set in the same universe, and more starting configurations for existing ones.
• An "Open play" scenario.
• Modding support for user-made scenarios, enemies and classes.

?Quick answers

Keep reading