Build a Base RNG Wiki

Mid-game

When to stop rolling and start crafting

Rolling has a ceiling. Crafting is how you get past it, and it is the only realistic route to a Galaxy object.

Updated

Crafting machine tier-up recipe with Legendary result table
Tier-up craft — 10 Refined + 20 Epic into a Legendary outcome table.

The maths of the switch

The tier-up recipe consumes ten Refined and twenty Epic objects and returns one Legendary. It hands back a Wooden Tesla 52% of the time — an object that is a tiny fraction of a percent from the roll table.

Once you are producing surplus Refined and Epic objects faster than you can place them, every one you do not craft with is wasted.

ResultChance
Wooden Tesla52%
Rusty Mortar26%
Metal Spear Barrel6%
Rusty Trap6%
Slime Cannon5%
Metal Block5%

Relic recipes are a different tier

Beyond the tier-up recipe, the machine holds recipes that consume a relic — Crooked Skull, Burger, Barbell, Wizard Hat and Soda. Each produces a specific object rather than a random one, and each rolls a mutation on top.

Heavy Harpoon is the odd one out on mutation odds: 88% plain, 11% Shiny, 1% Galaxy. The others observed so far use 92/7/1.

Heavy Harpoon relic crafting recipe
Crooked Skull Relic recipe — note the 88/11/1 mutation split on the right.

This is how you get a Galaxy object

Every relic recipe rolls a mutation: usually 92% plain, 7% Shiny and 1% Galaxy. A flat 1% on a craft you were making anyway is far better than hunting a Galaxy through the roll table.

Given a Galaxy object was measured at 10.5x the health of its plain version and reads a full tier higher, that 1% is the most valuable percentage in the game.

Galaxy tab of the object index
Galaxy objects are separate index slots — crafting is the practical way to fill them.

Named materials change the plan

Reinforced Cannon wants five Shiny Basic Cannons, not five random Shiny objects. Wizard Tower wants fifteen Witch Brew. Those recipes force you to unlock Shiny rolls and to keep specific objects in inventory instead of selling or placing them.

Reinforced Cannon recipe requiring Shiny Basic Cannon
Named material: 5× Shiny Basic Cannon on the Barbell Relic recipe.

What to bank

Stop placing every Refined and Epic object you roll. The recipes want them in stacks of ten and twenty, and a Mythic recipe wants twenty Mythics. Storage is what turns rolls into progress at this stage.

Also bank Witch Brew and Shiny Basic Cannon once you see those recipes on the machine — they are bottlenecks even when you are swimming in generic rarities.

Coverage warning

The machine counts 21 recipes and six are confirmed with full tables on the crafting page. Wave gates exist at wave 75 and wave 225 for recipes whose names were not readable. This guide does not invent those recipes.

More guides

FAQ

When to stop rolling and start crafting FAQ

When should I start crafting?

As soon as you are rolling Refined and Epic objects faster than your placement limit can use them.

Are relics dropped by bosses?

We do not know. They are consumed by recipes, but no relic drop appeared in roughly two hours of recordings from ten players, so we are not going to state a source.

Where is the full recipe list?

On the Crafting page of this site — each verified recipe includes the percentages the game prints and a screenshot when we have one.