Mine

"Mines trigger and explode when an enemy comes close. They deal area damage around them."

Summary

Mines are first unlocked upon reaching Headquarters level 2.
Mines are visible, proximity-fused traps that trigger with a 1-second delay when ground troops or Critters are nearby. They can also be set off by a variety of other sources:
- Artillery/Barrage/Cryobomb
- Grenadier, Rain Maker and Lazortron's attacks.
- Flotsam Cannon's explosion
- Pvt. Bullit's Shock Knuckles
- Sgt. Brick's Cluster Grenade
- Cpt. Everspark's Explosive Charges
Mines activate only once, but are automatically replaced in-between battles at no additional cost.
Building Damage statues do not affect Mines.

Poorly placed Mines can easily be avoided with the use of Flares, potentially making it easier to destroy a base.
Using Artillery, Barrages, or Critters on Mines can trigger them, preventing troops from getting damaged by them. However, it is sometimes more energy-efficient to simply guide troops around Mines using Flares.
- Attacks from Grenadiers, Lazortrons and Rain Makers can destroy Mines as well.
At lower levels when you do not have the Barrage unlocked, you can trigger spread-out Mines using Heavies because using solely Artillery will not destroy the Mines efficiently. This will prevent you from losing groups of Riflemen and Zookas to Mines.

At lower levels, placing Mines in a spread-out fashion, surrounding the base at least 3 tiles out from the first buildings, is the most effective way to position them and to stop troops from navigating around them.
Players might use their Gunboat's Artillery, Barrage, and/or Critters to destroy Mines before sending out their troops, so it's important to keep Mines separate from each other so attackers cannot clear all of them too easily.
Make it hard to avoid most of your Mines on the way to the Headquarters since Mines are an important defense against Warrior attacks.
Hiding your Mines/Boom Mines behind tall buildings such as Sniper Towers can make them a surprise to your attacker and help you win your defense.
Try to place your Mines so that they are not too close to your buildings. Attackers try to hit the Mines that are close to defenses while using the Artillery or a Barrage. If you place your mines further out, the Artillery or Barrage should not hit both the building and the mines.
It is best to avoid placing all or most of your mines on the shore where troops will be dropped off. An attacker can easily drop Artillery or a Barrage and clear a path and then use a Flare to help guide the Troops through the hole.

The Mine is a green, cylindrical device with another circular hole that extends above its roof, housing a red blinking light. A handle can be seen at the bottom-right corner.
There are no visual changes between levels, but each upgrade increases damage (by 10%).

When the Headquarters is destroyed, all the buildings except the Mines, Boom Mines, and Shock Mines explode.
The damage that a single Mine does is equal to the DPS of an equal-level Sniper Tower up until level 22. On level 23 onwards, the Mine does slightly less damage (by 9 for level 23, by 10 for level 24, by 12 for level 25).

HQ Level	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26
Number Available	0	3	3	6	6	9	9	12	12	12	15	15	15	18	18	18	21	21	21	24	24	24	24	24	24	27

Building Size	Trigger Radius	Damage Radius	Trigger Delay
1x1	1.5 Tiles	3 Tiles	1s

Level	Damage	Upgrade Cost	Upgrade Time	Build Cost	Instant	Armory Level Required	XP Gain
1	40	N/A	N/A	20	N/A	N/A	N/A
2	44	5,300	1h	33	33	1	10
3	48	13,600	1h	50	42	2	14
4	53	29,900	2h	80	75	3	17
5	59	60,000	3h	120	111	4	20
6	64	123,000	5h	170	175	5	24
7	71	169,000	6h	240	207	6	30
8	78	261,000	8h	340	267	7	33
9	86	360,000	9h	480	316	8	36
10	94	370,000	9h	700	319	9	36
11	104	470,000	10h	1,000	363	10	37
12	114	870,000	13h	1,400	514	11	42
13	126	1,190,000	15h	2,000	619	12	45
14	138	1,220,000	15h	2,800	628	13	45
15	152	1,880,000	19h	3,900	823	14	50
16	167	2,550,000	21h	5,000	992	15	53
17	184	3,050,000	21h	7,000	1,095	16	53
18	202	3,600,000	23h	10,000	1,224	17	57
19	222	3,600,000	1d	14,000	1,233	18	58
20	245	3,700,000	1d 1h	20,000	1,258	19	60
21	269	3,800,000	1d 2h	27,000	1,289	20	62
22	296	4,000,000	1d 4h	35,000	1,345	21	64
23	326	4,200,000	1d 6h	44,000	1,399	23	66
24	358	4,400,000	1d 8h	54,000	1,451	24	68
25	392	4,600,000	1d 10h	65,000	1,506	25	70
26	432	4,800,000	1d 12h	??,???	1,549	26	72

Rank	Level	Build Count	Upgrade Tokens	Tech Level
1	8	5	N/A	5
2	10	10	23,000	10
3	12	15	41,500	15
4	16	20	81,500	20
5	22	25	180,000	25
Total			326,000	75

Buildings
Economy Buildings	Residence • Sawmill • Quarry • Iron Mine • Gold Storage • Wood Storage • Stone Storage • Iron Storage • Vault
Defensive Buildings	Sniper Tower • Mortar • Machine Gun • Cannon • Flamethrower • Boom Cannon • Rocket Launcher • Critter Launcher • Shock Launcher • Bunker • Mine • Boom Mine • Shock Mine
Prototype Defenses	Shock Blaster • Lazor Beam • Doom Cannon • Damage Amplifier • Shield Generator • Hot Pot • Grappler • S.I.M.O. • Sky Shield • Microwav'r • Boom Surprise • Flotsam Cannon
Support Buildings	Landing Craft • Gunboat • Sculptor • Statue Storage • Radar • Armory • Submarine • Weapon Lab • Mystical Monument
Core Buildings	Headquarters • Outpost • Engine Room • Power Core • Mega Core
Other Buildings	Hero Hut • MMG 9000 • Super Mortar • Barbed Wire • Supply Buildings • Decoration • Obstacles • Skins