8 Bit Tower Defense Currencies Guide: Gold, Gems, Candy and Rerolls Explained

Gold, Gems, Candy, Trait Rerolls and Stat Rerolls are the currencies 8 Bit Tower Defense's HUD and menus put in front of you, and each has a clear job.

One mix-up is worth clearing before anything else: the same coin icon covers two different gold wallets. In-match cash and hub gold share an image but not a balance, so a healthy match wallet says nothing about your hub savings. The table below maps every resource, and each section after it explains one in detail.

Quick answer

8 Bit Tower Defense runs on the currencies its HUD and menus show: Gold (coins), Gems, Candy, Trait Rerolls and Stat Rerolls. Gold funds in-match placements and upgrades plus hub unit level-ups, Gems pay for unit summons and can stand in for Stat Rerolls, Candy is the Hollow Night event currency, and the two rerolls reset a unit's trait and stat grades.

• Gold (coins) — in-match placements and upgrades, plus unit level-ups in the hub
• Gems (blue diamonds) — unit summons, with a side job as stat-reroll payment
• Candy — Hollow Night event currency, banked from event tier wins
• Trait Rerolls — the tokens counted for rerolling a unit's trait
• Stat Rerolls — the tokens counted for rerolling a unit's stat grades

The currencies and rerolls at a glance

Data table

Resource

Gold (coins)

What it pays for

In-match unit placements and upgrades; hub unit level-ups (each level adds damage)

How you get more

Each match starts you with fresh cash; victory rewards pay into the hub (+750 for a Greenfield Outpost Act 2 clear); the hub tutorial grants 500

Resource

Gems

What it pays for

Unit summons; alternate payment on the stat-grade reroll button

How you get more

Index discovery rewards via Claim All; quests and achievements (250-2,000 diamonds); the Settings group-join claim (+100)

Resource

Candy

What it pays for

The Hollow Night event, as its dedicated event currency

How you get more

Event tier wins on the Pumpkin Patch map (the Tier 1 Trick win pays 200 Candy); a First Win x3 multiplier

Resource

Trait Rerolls

What it pays for

Rerolling a unit's trait

How you get more

The Settings group-join claim (+1); the hub tutorial (+2)

Resource

Stat Rerolls

What it pays for

Rerolling a unit's stat-grade ladder from the Stats sub-tab

How you get more

Gems substitute directly on the reroll button

Data table

Resource	What it pays for	How you get more
Gold (coins)	In-match unit placements and upgrades; hub unit level-ups (each level adds damage)	Each match starts you with fresh cash; victory rewards pay into the hub (+750 for a Greenfield Outpost Act 2 clear); the hub tutorial grants 500
Gems	Unit summons; alternate payment on the stat-grade reroll button	Index discovery rewards via Claim All; quests and achievements (250-2,000 diamonds); the Settings group-join claim (+100)
Candy	The Hollow Night event, as its dedicated event currency	Event tier wins on the Pumpkin Patch map (the Tier 1 Trick win pays 200 Candy); a First Win x3 multiplier
Trait Rerolls	Rerolling a unit's trait	The Settings group-join claim (+1); the hub tutorial (+2)
Stat Rerolls	Rerolling a unit's stat-grade ladder from the Stats sub-tab	Gems substitute directly on the reroll button

Gold: two wallets under one coin icon

Every match starts you with its own cash balance instead of letting you spend hub savings. A story match opened at Wave 0/8 with $1,000 in hand, and an Act 2 restart began at $1,614 — while the hub counter at the same time read 8,988. That in-match wallet is what you spend placing units and buying their unit upgrades as waves roll in, and it lives only inside the match.

Winning ties the two wallets together. Victory pays gold into the hub economy — clearing Greenfield Outpost Act 2, for example, paid +750 gold — and hub gold spends in one main place: the unit level tab, where each level adds damage. The tutorial even seeds the loop, granting 500 gold and pointing you straight to that tab. The full earning picture is in the how to get gold guide, and the leveling route in how to level up.

Gems: the summon currency

Gems are the currency behind unit summons. The split with gold is the core rule of the economy: gold handles battles and unit leveling, while gems pay for summons. Where those summons lead, the how to get units guide picks up.

Three gem sources sit plainly in the menus:

• The Index grants gems for new unit discoveries, collected with a Claim All button — for example +375 gems for 13 discoveries, +360 for 5 and +240 for 4.
• Quests and achievements pay diamonds, with achievement payouts running from 250 to 2,000.
• The Settings group-join claim ('Like the game and join the group for free gems!') pays +100 Gems plus +1 Trait Reroll in one click.

Gems also carry one side job: on a unit's stat-grade reroll button, gems substitute directly for Stat Rerolls, so a gem stockpile doubles as reroll fuel. The earning routes are detailed in how to get gems.

Candy: the Hollow Night event currency

Candy sits outside the battle economy entirely — it is the dedicated currency of the Hollow Night event. You earn it on the event's Pumpkin Patch map, whose tier stages run Trick, Treat, Haunt, Dread, Nightfall and Midnight. Each tier is a win condition: Tier 1, Trick, asks you to clear the event take on story world 1 on Normal — curses make the match harder — and that win pays 200 Candy.

The event screen keeps your total on display ('Your Candy'), shows a First Win x3 multiplier and posts a 600 Candy next-goal display. More on earning it: how to get candy.

Trait Rerolls: dice tokens for trait rerolls

Trait Rerolls show up in the HUD as dice-style tokens, and their name is their job: the game counts them toward rerolling a unit's trait. Two grant sources appear in the menus — the Settings group-join claim adds +1 Trait Reroll alongside its 100 gems, and the hub tutorial hands out 2 of them together with your first 500 gold. A Settings option called 'Ask before trait rerolls' puts a confirmation in front of the action. What traits actually do once rolled is the territory of the traits guide, and how to get trait rerolls tracks the farming routes.

Stat Rerolls: rerolling a unit's grade ladder

Stat Rerolls spend on a unit's Stats sub-tab, on the REROLL GRADES button, which rerolls that unit's grade ladder. The button accepts Stat Rerolls or Gems — the version on the Chameleon screen read '45 Stat Rerolls (or Gems)' — so gems fill the gap when the token count runs dry.

Rerolling also interacts with the unit's Potential counter, which builds from defeats (Chameleon showed 45/2,000 defeats); the screen states the trade plainly: rerolling empties it. Sources for the tokens themselves are collected in how to get stat rerolls.

Putting it together

A sensible opening routine falls straight out of the sources above: claim the Settings group-join reward (+100 Gems and a Trait Reroll for one click), sweep the Index's Claim All for pending discovery gems, and let story victories bank the gold that levels your squad. Codes are kept off this page — the codes list tracks them separately — and the progression guide shows how all of these resources feed the long game.