8 Bit Tower Defense Units List: Rarity Tiers, Named Units and How to Read Unit Cards

Last updated: 2026-11-12

The 8 Bit Tower Defense units list: every unit name captured so far, the five rarity tiers, and how to read each unit's rarity, attributes and traits.

Quick answer

8 Bit Tower Defense advertises 50+ collectible units across five rarity tiers: Rare, Epic, Legendary, Mythic and Secret. Your collection is browsable on the Units screen with rarity filter tabs, and unit cards show an attribute line describing how the unit fights (the observed starter cards also carry a per-unit trait description).

The Units screen tabs — ALL, RARE, EPIC, LEGENDARY, MYTHIC, SECRET — filter your collection by tier.
Starter cards, for example, carry descriptive attribute lines such as Single target / Long range / Hits flying, with a per-unit trait description.
Standard summon rates run from Rare 70.74% down to Secret 0.01%, and a SUMMON x10 costs 500 gems.
Levels, trades and traits stack on top of a card, and all three add damage, range, cash or more.

8 Bit Tower Defense counts its roster in bulk — the official description advertises 50+ units to collect — but it never names them all in one place. This page pulls together the unit names that have actually appeared in the game so far, explains the five rarity tiers behind the roster, and shows you how to read any unit's rarity and attributes once it is in your squad. Treat the list below as a working snapshot rather than the complete 50+, since event banners add their own exclusive units.

The five rarity tiers and summon rates

Every collectible unit belongs to one of five tiers — Rare, Epic, Legendary, Mythic and Secret — and the summon menu's RATES display shows the chance of pulling each tier:

Data table

Rarity tier: Rare
Summon rate: 70.74%

Rarity tier: Epic
Summon rate: 26%

Rarity tier: Legendary
Summon rate: 3%

Rarity tier: Mythic
Summon rate: 0.25%

Rarity tier: Secret
Summon rate: 0.01%

Data table
Rarity tier	Summon rate
Rare	70.74%
Epic	26%
Legendary	3%
Mythic	0.25%
Secret	0.01%

A SUMMON x10 costs 500 gems, and on the observed banner roughly seven in ten summons returned a Rare, with Secret the rarest outcome at just 0.01%. Rates can change with banners or updates, and event banners list their own per-unit rates, so treat the table as a snapshot rather than a permanent rule.

Named units seen so far

The official description promises 50+ units but names none of them. The names below are the ones that have surfaced in gameplay so far: the three starter picks with their exact card lines, eleven units from a recorded Units inventory, eleven more named during matches, and two Hollow Night event exclusives. Names heard in commentary rather than printed on screen may be spelled slightly differently in game.

Open the Units screen — it shows every unit you have collected.
Use the rarity tabs — ALL, RARE, EPIC, LEGENDARY, MYTHIC or SECRET — to filter the grid down to a single tier.
Open an individual unit to reach its detail page, where the attribute line and a Traits sub-tab live.

Because each tab matches one summon tier, the tabs double as a collection progress check: empty MYTHIC and SECRET tabs mean your summons have not landed in those tiers yet.

How to read a unit card

A unit card compresses combat behavior into a short attribute line. The three starter picks show the pattern:

Pebble Frog — Single target / Long range / Hits flying: a long-range unit that hits one enemy at a time and can hit flying enemies.
Honey Bee — Swarm striker / Fast stings / Swarm bonus: a fast stinging striker built around swarm play, with a swarm bonus written directly on the card.
Dart Dragonfly — Dart volleys / Hits flying: an attacker that fires dart volleys, including at flying enemies.

The observed starter cards each also carry their own per-unit trait description alongside the attribute line.

What levels, trades and traits add

The attributes you read on a card are the starting point. Three systems stack on top of them:

System	Where to find it	What it adds
Level	The Level tab on a unit	Gold buys levels, and each level adds damage. Squad units also gain XP from every match.
Trades	The Trades tab on a unit	Trade rewards land here and add damage, range, cash and more. Rerolling trades the current reward for a new one, such as 'Vigor, plus 5% damage'.
Traits	The Traits sub-tab on a unit detail page	Trait Rerolls are stored here. REROLL rolls a new trait with a dice, and traits add damage, range, cash and more — for example 'SWIFT I - 5% faster attacks'.

How to get more units and evolve Mythics

New units arrive through the summon menu, where a SUMMON x10 costs 500 gems — see how to get units for more ways to get units, and how to get gems for the currency that funds it. Event banners sit alongside the standard one: the Hollow Night event carried Headless Horseman as a Secret and Grim Reaper as a Mythic.

The official description also says you can evolve Mythics into stronger forms. Exactly which Mythics qualify is not established — one player noticed that not every unit seemed to have an evolve option, but that observation remains unconfirmed — so check the how to evolve Mythic units guide before planning a squad around evolution.

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Unit Rarities: Five Tiers

Recognize the five rarity tiers at a glance and see each tier's base summon rate.

Unit Tier List

Judge units by battlefield role instead of rarity, and see which summons and upgrades are worth prioritizing.