How much does Hourglass cost?

Base price 100; in the shop 111 at wave 1, 210 at wave 10 and 320 at wave 20 (before price modifiers).

How do you unlock Hourglass?

It is unlocked by the challenge “Let’s try this wave again ” (During the last 5 seconds of a wave after wave 2, press ‘Return to Main Menu’. Then press ‘Resume’ to try the wave again).

Tier IV item · Base game

Hourglass

Hourglass is a Tier IV item in Brotato 1.1.15.4 (Base game). Effects: Turns back time, decreasing the current wave count by 1. Start the next wave with 1 HP. It has a base price of 100 materials: 111 in the wave 1 shop and 320 by wave 20. You can hold only one (unique).

This section as JSON: /raw/items.json

Quick answers (3)

What does Hourglass do in Brotato?: Turns back time, decreasing the current wave count by 1. Start the next wave with 1 HP.
How much does Hourglass cost?: Base price 100; in the shop 111 at wave 1, 210 at wave 10 and 320 at wave 20 (before price modifiers).
How do you unlock Hourglass?: It is unlocked by the challenge “Let’s try this wave again ” (During the last 5 seconds of a wave after wave 2, press ‘Return to Main Menu’. Then press ‘Resume’ to try the wave again).

Effects

Turns back time, decreasing the current wave count by 1
Start the next wave with 1 HP

As the game prints them in the shop, for a character with no other stats.

Base price

100

Limit

unique

Tier: Tier IV
In the shop: Yes
Unlock: Let’s try this wave again
Game ID: item_hourglass

Price by wave

Wave	1	5	10	15	20
Shop price	111	155	210	265	320
Recycle for	27	38	52	66	80

How this is worked out

Shop price = (base + wave + base × wave × 0.1), rounded down, before price modifiers (an items-price stat changes it by its percentage). Recycling returns 25% of that. From the game's ItemService.get_value and get_recycling_value.