Smart Missiles are an Ultimate Weapon that periodically fires a volley of homing missiles at enemies. Each missile tracks its target and explodes on impact, dealing damage based on a multiplier of your tower's damage — and because that multiplier accounts for your crit and super crit factor and chance, the weapon scales with the rest of your build.
Beyond the basic workshop upgrades, Smart Missiles have one of the largest lab trees of any Ultimate Weapon, letting you extend missile lifetime, stack damage on repeat hits, add area-of-effect explosions, and unlock a manually triggered Missile Barrage.
Description
Smart Missiles are an Ultimate Weapon. Once activated, they launch a set number of missiles on a repeating timer. The missiles home in on enemies and detonate when they connect.
The damage each missile deals is a multiplier of your tower damage. That calculation includes your crit and super crit factor and chance, so anything that raises those stats also raises your missile output.
Workshop — Basic Upgrades
Like every Ultimate Weapon, Smart Missiles' basic upgrades sit in the Ultimate Weapon menu once you've unlocked the weapon itself. From there you can spend stones on three tracks: Damage, Quantity, and Cooldown.
Damage has 35 levels, Quantity has 15 levels, and Cooldown has 16 levels. Maxing all three tracks costs 39,177 stones in total (verified against the game build v29.0.5); the per-level breakdown is in the cost table below.
| Damage | Cost | Quantity | Cost | Cooldown | Cost |
|---|---|---|---|---|---|
| 10x | 0 | 5# | 0 | 180s | 0 |
| 11x | 5 | 6# | 4 | 170s | 8 |
| 13x | 11 | 7# | 12 | 160s | 24 |
| 16x | 17 | 8# | 35 | 150s | 40 |
| 20x | 23 | 9# | 70 | 140s | 56 |
| 26x | 29 | 10# | 120 | 130s | 72 |
| 34x | 35 | 11# | 180 | 120s | 88 |
| 43x | 41 | 12# | 275 | 110s | 104 |
| 55x | 47 | 13# | 350 | 100s | 120 |
| 69x | 53 | 14# | 420 | 90s | 136 |
Workshop — Ultimate Weapon Plus
Ultimate Weapon Plus abilities become available only after you've purchased all 9 Ultimate Weapons. For Smart Missiles, the UW+ ability is Cover Fire, which passively launches an extra Smart Missile every few seconds on top of your normal volleys. The interval per level is listed in the table below.
| UW+ Cost Table | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Level | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Cost | Unlocked | 300 | 375 | 475 | 600 | 725 | 925 | 1,150 | 1,450 | 1,800 | 2,200 | 2,650 |
| Value | 13s | 12s | 11s | 10s | 9s | 8s | 7s | 6s | 5s | 4s | 3s | 2s |
Lab — Missile Despawn Time
Missile Despawn Time extends how long a missile stays in flight before disappearing if it hasn't hit anything. More time means fewer wasted missiles when targets are sparse or far away. This research has 20 levels.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 0d 20h 0m | 250,000 | 1 |
| 2 | 0d 23h 21m | 285,000 | 2 |
| 3 | 1d 2h 53m | 496,983 | 3 |
| 4 | 1d 6h 55m | 1,451,215 | 4 |
| 5 | 1d 11h 49m | 4,230,235 | 5 |
| 6 | 1d 18h 6m | 10,504,107 | 6 |
| 7 | 2d 2h 17m | 22,584,546 | 7 |
| 8 | 2d 12h 59m | 43,469,902 | 8 |
| 9 | 3d 2h 50m | 76,884,092 | 9 |
| 10 | 3d 20h 32m | 127,311,123 | 10 |
Lab — Missile Amplifier
Missile Amplifier makes repeated hits on the same enemy progressively stronger: each missile that lands boosts the damage of the next missile striking that target, and the bonus stacks additively. It's especially valuable against tough, long-lived targets that soak multiple volleys. This research has 25 levels.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 0d 20h 0m | 500,000 | 2.50 |
| 2 | 1d 4h 21m | 860,000 | 4.00 |
| 3 | 1d 12h 53m | 1,451,067 | 5.50 |
| 4 | 1d 21h 55m | 3,204,299 | 7.00 |
| 5 | 2d 7h 49m | 8,203,460 | 8.50 |
| 6 | 2d 19h 6m | 20,041,418 | 10.00 |
| 7 | 3d 8h 17m | 44,133,965 | 11.50 |
| 8 | 3d 23h 59m | 88,006,201 | 13.00 |
| 9 | 4d 18h 50m | 161,559,043 | 14.50 |
| 10 | 5d 17h 32m | 277,320,352 | 16.00 |
Lab — Missiles Explosion
Missiles Explosion is a single-level research that turns every missile impact into an area-of-effect blast, damaging enemies around the target rather than just the target itself. The starting blast radius is 0.30. Completing it unlocks the Missiles Radius research.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 0d 22h 13m | 900,000 | Unlocked |
Lab — Missiles Radius
Missiles Radius becomes available once Missiles Explosion is complete. Each level widens the area-of-effect blast from your missile impacts, letting a single volley catch more enemies. This research has 20 levels.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 1d 14h 53m | 800,000 | 0.35 |
| 2 | 1d 18h 14m | 835,000 | 0.40 |
| 3 | 1d 21h 47m | 1,046,983 | 0.45 |
| 4 | 2d 1h 48m | 2,001,215 | 0.50 |
| 5 | 2d 6h 43m | 4,780,235 | 0.55 |
| 6 | 2d 12h 59m | 11,054,107 | 0.60 |
| 7 | 2d 21h 11m | 23,134,546 | 0.65 |
| 8 | 3d 7h 52m | 44,019,902 | 0.70 |
| 9 | 3d 21h 43m | 77,434,092 | 0.75 |
| 10 | 4d 15h 25m | 127,861,123 | 0.80 |
Lab — Missile Barrage
Missile Barrage is a single-level research that adds a manually activated ability: once per run, you can fire a barrage of missiles all at the same time, with a base amount of 20 missiles per activation. You trigger it yourself during a round, so you can save it for a dangerous wave. Completing it unlocks the Missile Barrage Quantity research.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 6d 16h 0m | 1,500,000 | Unlocked |
Lab — Missile Barrage Quantity
Missile Barrage Quantity raises the number of missiles fired each time you activate Missile Barrage, on top of the base 20. This research has 6 levels.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 0d 20h 0m | 750,000 | 25 |
| 2 | 1d 18h 14m | 1,660,000 | 30 |
| 3 | 2d 16h 47m | 2,859,100 | 35 |
| 4 | 3d 16h 25m | 5,750,118 | 40 |
| 5 | 4d 18h 36m | 13,904,255 | 45 |
| 6 | 6d 1h 23m | 34,083,767 | 50 |
Lab — Recharge Missile Barrage
Recharge Missile Barrage removes the one-use-per-run limit by letting Missile Barrage recharge after a set number of waves, so you can trigger it multiple times in a long run. This research has 7 levels and is unlocked in Milestones at tier 14 wave 60.
| Level | Time | Coins | Value |
|---|---|---|---|
| 1 | 5d 5h 0m | 550.00B | 1500 |
| 2 | 6d 14h 21m | 1.05T | 1250 |
| 3 | 8d 0h 55m | 1.55T | 1000 |
| 4 | 9d 23h 10m | 2.05T | 750 |
| 5 | 14d 1h 59m | 2.56T | 500 |
| 6 | 24d 19h 29m | 3.07T | 350 |
| 7 | 51d 8h 12m | 3.60T | 200 |
Lab
Smart Missile lab researches are gated behind Milestones. Missile Despawn Time, Missile Amplifier, Missiles Explosion, and Missiles Radius all unlock at tier 7 wave 30. Missile Barrage and Missile Barrage Quantity unlock later, at tier 8 wave 50. Recharge Missile Barrage is separate, unlocking at tier 14 wave 60.