Undercroft Deckbuilder Roguelike Gems Guide: How to Get Gems and What They're For

Quick answer

Gems are the premium currency of Undercroft Deckbuilder Roguelike. The documented ways to get them are the four Gem packs sold for Robux in the shop and a daily gift quest that the quest list shows with a 20 Gems reward.

• 1,500 Gems — R$ 100
• 3,300 Gems — R$ 200
• 7,200 Gems — R$ 400
• 19,500 Gems — R$ 1,000
• The quest list includes a daily gift entry shown with a 20 Gems reward
• The documented catalog prices every other item — skins, Revives, card backs, the Season 1 Pass — in Robux rather than Gems, so check the in-game shop for a Gem price before stocking up
• Pack sizes and prices come from the developer-product catalog at the time it was captured, so offerings can change

Gems are what Undercroft puts in front of you when you open the paid side of the shop: every pack above is a developer product bought with Roblox's Robux (shown as R$), not something earned through runs. This guide walks through the pack lineup and how their prices compare, the free Gem route the game advertises in its quest list, and what a Gem balance actually does — including the part the current material genuinely doesn't pin down.

What Gems are in Undercroft Deckbuilder Roguelike

Gems are Undercroft Deckbuilder Roguelike's premium currency — the item its shop sells directly for Robux. They appear inside a 27-item developer-product catalog that also lists hero skins, a Hero Collection, a Starter Pack, Revives, card backs, the Season 1 Pass and assorted Gifts. Within that catalog the largest Gem pack sits at the expensive end: it costs R$ 1,000, and only the Hero Collection at R$ 1,599 (together with its Gift version) is priced higher.

Gem packs and prices

The shop lists four Gem packs:

The per-Robux column is simply each pack's size divided by its listed price, and it climbs with every step up: the entry pack sells 15 Gems per Robux while the R$ 1,000 pack sells 19.5. If you do buy Gems, the bigger packs buy the currency at a better rate, while the smaller packs keep the Robux outlay down.

Treat the whole table as a snapshot of the listed developer-product catalog at the time it was captured. Offerings and prices can change, so the in-game shop is the final word on what a pack costs today.

For context, the rest of that catalog runs from a single Revive at R$ 50 up to the Hero Collection at R$ 1,599, with hero skins at R$ 449–899, the Starter Pack at R$ 499 and the Season 1 Pass at R$ 199. The largest Gem pack therefore sits near the top of the shop's price range, while the smaller packs run R$ 100–400.

Free Gems: the daily gift quest

You don't need Robux to run into Gems. The game's quest list includes a daily gift quest, displayed as "daily gift. 20 gems" — a 20 Gems reward attached to a daily quest entry. That makes the quest tab worth a glance if you play most days, since it's the free Gem route the game itself puts in front of you.

What Gems are for

Both documented Gem sources point the same direction: Gems are a currency you accumulate, whether from a Robux pack or the daily quest reward. What the material behind this guide does not document is any specific price tag paid in Gems. The shop catalog prices everything else it lists — skins, Revives, card backs, the Season 1 Pass, the Starter Pack, the Hero Collection and Gifts — directly in Robux rather than in Gem amounts.

That gap matters if you're buying a pack for a particular purpose. Before stocking up, open the in-game shop and confirm the item you actually want is priced in Gems, because the documented catalog sells its extras straight for Robux instead. If your shop screen does show an item with a Gem price, that in-game label is the ground truth to plan around.

Other Undercroft shop guides

For the wider paid side of the game, the gamepasses guide, VIP benefits, customization guide and fast mode pages cover the other purchases in the game's catalog.