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8-Bit Tower Defense Wiki

Summon pixel heroes and hold the road against the Hollow. Build a squad, strengthen your units, and tackle story battles, raids, and Expedition.

Open CodesPlay Game
How to Play
Pixel-art tower defense scene: a wizard, a fox unit and a cat unit firing projectiles at goblin enemies marching along a winding grass path.
50+ Collectible Units6 Story WorldsUp to 4 in Co-op Raids

Play your first battle

Place units on lit spots beside the road, press START and spend battle cash on upgrades to clear every wave.

  1. Pick a unit from the bottom bar

    Your available units line the bottom of the screen.

  2. Tap a lit spot beside the road

    Only highlighted spots accept a unit, and each unit attacks anything inside its circle.

  3. Press START to send the first wave

    Enemies follow the road toward your outpost.

  4. Tap a placed unit and press UPGRADE

    Every defeated enemy pays cash, and matches start with cash in the bank.

  5. Clear every wave to win

    The training match ends with 'VICTORY - TRAINING COMPLETE' after Wave 4.

Explore the Wiki

Pick a section: units, combat, modes and progression guides, the codes list, and the game's official community links.

Units

Browse summoning rates, the rarity tiers and unit roles, then evolve, trait and reroll the units you own.

Combat

Learn first-battle steps, placement and upgrade strategy, ability timings and how to beat each boss.

Modes

Compare the story worlds, 4-player raids, Expedition relic runs, Challenges and the Hollow Night event.

Progression

Track XP sources, earn every currency and reroll resource, and see what each one pays for.

Codes

Check the codes reported active for the game, the rewards each gives, and the exact redemption steps.

Community

Find the game's verified official group and community entry points in one place.

What Is 8-Bit Tower Defense?

Official screenshot showing a wizard, an octopus and a shark unit defending against a huge horde of goblin enemies swarming across a dirt path.

8-Bit Tower Defense is a Roblox strategy game by Pixel TD with a retro pixel-art setting and an enemy force called the Hollow. Players expand their hero collection and develop stronger squads as they progress through different battles and challenges.

Meet the Units

Platform

Roblox

Genre

Strategy / Tower Defense

Developer

Pixel TD

Enemy Force

The Hollow

Latest Guides

How to Get Units in 8 Bit Tower Defense (Summoning Guide)

8 Bit Tower Defense Bosses Guide: Which Bosses Appear, When They Arrive, and How to Beat Them

8 Bit Tower Defense Raids Guide: Co-op Raids, Player Count and Raid Locations

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

How to Sell Units in 8 Bit Tower Defense Without Selling a Keeper

8 Bit Tower Defense Best Team: How to Build a Squad That Works Together

8 Bit Tower Defense Auto Skip Waves: Where the Setting Is and How to Turn It On or Off

8 Bit Tower Defense Ashen Citadel Guide: Where It Is and How to Unlock It

Browse Unit Guides

Get new units

Summon in the outpost with Gems — a ten-pull costs 500 — and claim Index discoveries to earn Gems back.

Step 1

Open SUMMON in the outpost

Your first unit arrives free from the tutorial; summoning is how you add more.

Step 2

Choose single or x10

SUMMON x10 costs 500 Gems, and single draws cost less.

Step 3

Pick a banner

Standard, rotating featured and event banners roll into different pools.

Step 4

Claim new Index entries

New discoveries pay Gems back, so summoning partly funds itself.

Codes and rewards

Check codes and their rewards.

How to redeem
FIRSTSTAND
Reported active
500 Gems

Source checked:

HALLOWEEN
Reported active
3,000 Gems25 Trait Rerolls25 Stat Rerolls

Source checked:

HALLOWEENPT2
Reported active
2,500 Gems10,000 Candy15 Trait Rerolls15 Stat Rerolls

Source checked:

HOLLOWHUNT
Reported active
1,000 Gold

Source checked:

OUTPOST
Reported active
300 Gems

Source checked:

PIXELPOWER
Reported active
200 Gems2 Trait Rerolls

Source checked:

RELEASE
Reported active
1,500 Gems

Source checked:

THANKS
Reported active
3,000 Gems

Source checked:

UPDATE1
Reported active
2,500 Gems10,000 Gold15 Trait Rerolls15 Stat Rerolls

Source checked:

Meet the units

The three starter picks with their exact card lines, plus the Hollow Night event exclusives.

Starter

Pebble Frog

Starter pick. Card line: Single target / Long range / Hits flying.

Starter

Honey Bee

Starter pick. Card line: Swarm striker / Fast stings / Swarm bonus.

Starter

Dart Dragonfly

Starter pick. Card line: Dart volleys / Hits flying.

Event

Headless Horseman

Hollow Night event exclusive, Secret rarity at a 0.02% event banner rate.

Event

Grim Reaper

Hollow Night event exclusive, Mythic rarity at a 0.5% event banner rate.

Which unit to prioritize

Prioritize by role, not rarity — fill flying coverage, swarm clearing and boss damage as your squad needs them.

Choose for your situation

Flying enemies are getting past your defense

Summon for a unit whose card says Hits flying, like Pebble Frog or Dart Dragonfly.

Big crowds of weak enemies leak through

Prioritize swarm strikers like Honey Bee, and check your units for splash or poison behavior.

One heavy boss walks the path and nothing chips it down

Add long-range single-target damage, then upgrade that unit mid-battle with gold.

You run out of gold before your team is fully placed

Favor cheaper units you can place and upgrade early.

Build a balanced squad

Edit your squad before each match and cover the roles your cards leave open — flying, area damage and long range.

  1. High

    Flying coverage

    Bring at least one unit whose card says Hits flying — Pebble Frog and Dart Dragonfly qualify.

  2. High

    Area damage

    An attacker that covers an area handles groups while single-target units take one enemy at a time.

  3. High

    Copies of one unit

    Expect a placement cap per unit in matches; one player maxed out at four copies.

  4. Medium

    Long-range reach

    A long-range unit at the back covers a wide slice of the path; low-range units belong beside the road.

  5. Medium

    Support effects

    Poison, a slow and a shield that soaks damage first were all seen on placed units.

What to unlock next

Clear story acts in order — each world's Act 6 opens the next world — and unlock World Boss, Challenges, Expedition and Raids along the way.

  1. 1

    1. Greenfield Outpost (World 1)

    Clear Act 3 to face the Tide Titan World Boss; Act 6 opens Sakura Shrine and satisfies the Challenges gate.

  2. 2

    2. Sakura Shrine (World 2)

    Reaching Act 4 here is what opens Expedition.

  3. 3

    3. Dustbowl Canyon (World 3)

    Unlocks by clearing Sakura Shrine Act 6.

  4. 4

    4. Frostbite Pass (World 4)

    Unlocks by clearing Dustbowl Canyon Act 6.

Roll unit traits

Open the TRAITS tab, press REROLL and a dice rolls a new trait — traits add damage, range, cash and more.

  1. 1

    Open the TRAITS tab

    The trait tutorial's STEP 5/6 sends you here — that's where Trait Rerolls go.

  2. 2

    Press REROLL

    Pressing REROLL starts a roll for a new trait with a dice.

  3. 3

    Read the result

    The rolled trait shows its effect on it — the tutorial's roll produced SWIFT I, 5% faster attacks.

Frequently Asked Questions

Quick answers to common player questions, each linked to the full guide.

Summon them in the outpost: open SUMMON and spend Gems — a ten-pull costs 500 Gems. Your first unit comes free from the tutorial, and claiming new Index discoveries pays Gems back.Open the summoning guide

Open Settings in the game, find the CODES area, type the code into the 'Enter a code' field and click REDEEM. The group-reward CLAIM button sits right below it.Open Codes

Clear the story acts in order — each world's Act 6 opens the next world. Greenfield Outpost Act 3 also unlocks the World Boss mode, and later acts open Expedition and Raids.Open the progression guide

Prioritize by role, not rarity: fill flying coverage, swarm clearing and long-range boss damage as your squad needs them.Open the tier list guide

Yes — co-op raids support up to 4 players, with three raid locations to choose from: Rift Gate, Coral Cove and Eclipse Spire.Open the raids guide

Open the TRAITS tab on a unit and press REROLL: a dice rolls a new trait that adds damage, range, cash and more.Open the traits guide

Ready to Defend the Road?

Grab the currently reported codes, or head straight to the official Roblox experience.

Open CodesPlay on Roblox