Repairs come after the wave
The drones take off only once a wave has been cleared, so they cannot save a base during a wave. They make up for the lives you lost, ready for the next one.
Repair Drones
After each wave, every drone repairs one life of the base
300 goldSupportResearch 50000
The Repair Drones tower never shoots. When a wave has been cleared, each of its drones takes off, flies to your base, repairs 1 life and flies home: 1 drone at level 1 and one more every level, up to 5 at level 5. It costs 300 gold, and how far it can be upgraded is set by the Drone Bays research. Drones only fly for lives the base is missing, so it never takes the base above full health.
Attributes Level 1, on the ground
- Cost
- 300 gold to build
- Unlock
- 50,000 XPXP to research it (main menu, Upgrades & Research)
- Sell value
- 225 gold 75% of the gold spent on it; all of it back within 15 seconds of placing
- Targets at once
- none: it repairs your base
- Power
- uses 3 all the time It works all the time, so it has no standby. Switch it off to free its power.
- Neighbours
- +15% damage, +10% fire rate eachSame-type towers on its four sides, up to four (+60% / +40%). Connected Repair Droness need 25% less power.
- Platforms
- +8% damage, +0.5 range a level of heightSmall +1, Medium +2, Large +3, up to 3 stacked. Hills up to 15 (above 5 is rare). Standing onPlatformsGround: no height bonus
- Level parts
- Base: 1 green level light, plate 01
- Research
- 1 items, 4 levels each2,000 / 5,000 / 12,000 / 25,000 XP a level, 44,000 XP for all. Drone Bays
Base numbers: no research, cards or neighbours. (+n) is the change from the level before.
How to use it
Research Drone Bays first
Without it the tower stays at level 1, one drone. Each level of the research lets it go one level higher, up to level 5.
Build it out of the way
It needs no view of the path. Put it on a spot no gun wants; how far it is from the base only changes how long the trip takes, not what it repairs.
Several towers add up
Every drone repairs 1 life, whichever tower it comes from, and two towers never send drones for the same missing life.
Mind the power
It never waits on standby like a gun does. It draws its full power all the time: 3 at level 1, 5 at level 5.
Build it
Pick a level and how many Repair Drones towers you build, and see how many lives they repair after each wave, what they cost and the power they draw. Share the build with a link.
How the configurer works it out (formula, card values, share-link format)
How the game adds it up
- Damage: level base x (1 + neighbours x 0.15) x (1 + height x 0.08) x ground (0.95 on bare grass, else 1) x (1 + research %) x (1 + cards % + Endless %)
- Fire rate: level base x (1 + neighbours x 0.1) x (1 + research %) x (1 + cards % + Endless %)
- Range: level base + height x 0.5 + level base x (research % + cards % + Endless %)
- Dps: damage x fire rate, one hit on one target, before splash, afflictions and armour
- Rule: Every source multiplies damage and fire rate; cards and Endless cards of one stat add into one percent. Range percents are all of the levelled base, added.
End-of-wave cards
Each wave offers 3 cards. Up to 5 cards of each stat a game, then that stat comes only as grey Endless cards (a random amount in the range shown). Percent per card:
| Card | Normal | Common | Rare | Epic | Legendary | Mythical | Endless |
|---|
Research
Unlock: 50,000 XP; its upgrades: 44,000 XP for all.
- Drone Bays: +1% a level, 4 levels (+4%), 2,000, 5,000, 12,000, 25,000 XP
Where it stands
- Each same-type neighbour on its four sides: +15% damage, +10% fire rate (up to 4).
- Each level of height (hill + platforms): +8% damage, +0.5 range.
- Bare grass: damage x0.95 (no penalty on rock, or on a platform: it stands on steel, even over grass). One tile is 2 range units.
This tower's own rule
- After each wave every drone repairs 1 missing base life; one drone per level.
Worked examples
#build:l5: damage 0, fire rate 1/s, DPS 0, range 1.#build:l5~n3~h15: damage 0, fire rate 1.3/s, DPS 0, range 8.5.
Share-link format
A build is the page address + #build: + parts joined by ~, in any order; parts left out are 0 / none. Opening the link loads the build and scrolls here. Links shared from the page also carry ?utm_source=...&utm_medium=...&utm_campaign=tower_build&utm_content=... before the hash; they are optional.
l<N>: tower level 1..5r.<stat>.<N>: research level 0..4 of a research item (drone_bays)c.<stat>.<digits>: end-of-wave cards of one stat, one digit per card = its rarity (0 Normal, 1 Common, 2 Rare, 3 Epic, 4 Legendary, 5 Mythical); at most 5 a state.<stat>.<amount>x<count>: Endless cards of one stat: count cards of +amount% (only once that stat has 5 cards)n<N>: same-type neighbours touching it, 0..4h<N>: height: hill + platform levels, 0..15g: standing on bare grass (no platform)s<N>: level of the Cold Snap over it, 0 = none (1..10)sp0: that Cold Snap has no power (it cools nothing)w<N>: water tiles beside it, 0..4 (sides not taken by neighbours)k<N>: towers in its connected chain, itself included (at least neighbours + 1)kw<N>: water tiles beside the whole chain
Every level
It has no damage, fire rate or range that does anything: what each level adds is one landing pad and one drone. Power is what it draws all the time.
| Level | Upgrade | Total spent | Repair drones | Lives each | Power |
|---|---|---|---|---|---|
| 1 | build 300 | 300 | 1 | 1 | 3 |
| 2 | 450 | 750 | 2 | 1 | 4 |
| 3 | 675 | 1,425 | 3 | 1 | 4 |
| 4 | 1,012 | 2,437 | 4 | 1 | 5 |
| 5 | 1,518 | 3,955 | 5 | 1 | 5 |
Levels 1-5One drone per level, each repairing 1 life after a wave. Level 2 needs Drone Bays level 1, level 5 needs all 4 levels of it.
GoldUpgrading to level 2 costs 450 gold for one more drone; a second tower costs 360. Upgrades get dearer every level (level 5 alone costs 1,518 gold), new towers a step of 60 gold each.
Research
Research (main menu, Upgrades & Research) unlocks the Repair Drones tower for 50,000 XP. Its one research item has 4 levels for 2,000, 5,000, 12,000 and 25,000 XP (44,000 XP for all 4).
Drone Bays
each level lets the tower be upgraded 1 level further, so one more drone; all 4 levels take it to level 5, 5 drones. In a challenge that turns research off it stays at level 1.
Height and ground
- Hills: up to 15 levels on every map; above 5 is rare.
- Platforms (small +1, medium +2, large +3) stack up to 3 high: up to 9 more levels, on flat ground or on a hill. Research unlocks the sizes and stacking.
Repair Drones FAQ
No question matches. or ask on the forum.
Does the Repair Drones tower repair the base during a wave?
No. Its drones take off only when a wave has been cleared: every enemy of it gone and none left to come. Each drone then flies to the base, welds for 1.6 seconds, repairs 1 life and flies home. It makes up for lives you lost; it cannot stop a wave from destroying the base.
Why can't I upgrade my Repair Drones tower?
Its top level is set by the Drone Bays research: level 1 without it, one level more for each level of Drone Bays, up to level 5 with all 4. In a challenge that turns research off it stays at level 1.
Do several Repair Drones towers add up?
Yes. Each drone repairs 1 life, whichever tower it belongs to, so three level-1 towers repair three lives after a wave. Drones only fly for lives the base is actually missing, and two towers never send drones for the same life, so the base never goes above full health.
Why did my drones stay on their pads?
Either the base has no lives missing (or drones already on their way cover them), the drones are still out from the last trip, or the tower has no power. A drone only takes off for a life that is missing after the wave is cleared.
How much power does a Repair Drones tower use when it has nothing to shoot?
Its full power, all the time: it never shoots, so it never drops to standby like a gun. That is 3 at level 1, up to 5 at level 5. If the grid cannot give it all of that, it gets none (NO POWER) and its drones stay home, so a Repair Drones tower far from the base is the first to lose its power when the grid is short.
Does it matter where I build it?
Not for what it repairs. Distance from the base only changes how long the trip takes. Hills, platforms, neighbours and grass change damage, fire rate and range, and it uses none of those, so build it on a spot your guns do not need.
Is it better to upgrade my Repair Drones tower or build another?
Both add one drone. A second tower costs 360 gold, upgrading the first to level 2 costs 450, so early on a new tower is cheaper. Upgrades get dearer each level (level 5 alone costs 1,518), and each tower draws power all the time, so weigh gold against power.
Do end-of-wave cards make it repair more?
No. End-of-wave stat cards are never offered for the Repair Drones tower: more drones come only from levels, and more levels only from Drone Bays research.
Still stuck? or ask on the forum.
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Tower stats
In ranked games
From ranked games on version 0.1.8.16 and later. Held scores count once they are released. Your own numbers are shown only to you.
Tower stats
In players' games
From games where players turned on "launch reports and gameplay stats" in the game's settings: anonymous, no account or device is sent. Updated every few minutes.