Defense

Towers hold the line while you build. They shoot at attack groups, War Golems and nests in range, even when no player is nearby. Walls slow the creatures down so the towers have time to work. Like everything else in BlockFactory, defense is logistics: towers need ammunition, oil or power, and your factory has to deliver it.

Towers

	Gun Tower	Flame Tower	Rune Tower
Epoch	0	3	4
Unlocked by	Start	Flame Towers	Rune Towers
Size	2 × 2	2 × 3	2 × 2
Supply	Cartridges in its inventory	Light Oil from a pipe (rear right connection), 3 units per second	1 MW electric power
Range	18 blocks	12 blocks	24 blocks
Fire rate	10 shots per second	3 bursts per second	2 beams per second
Damage	5 per shot (Cartridge), 8 (Steel Cartridge), 16 (Uranium Cartridge)	20 per burst	40 per beam
Health	400	250	1200
Recipe	10 Iron Gear, 10 Copper Plate, 20 Iron Plate	30 Steel Plate, 15 Iron Gear, 10 Pipe T2	10 Rune Slate, 10 Steel Plate, 5 Processing Unit

All towers pick their targets the same way: first the nearest attack group, then a War Golem, then the nearest nest. A tower built within range of a nest slowly destroys it. Damage carries over from one creature to the next, so no shot is wasted.

Gun Tower

• Open it with Use and put cartridges in, or let grabbers fill it. Grabbers only put ammunition into it.
• One cartridge gives 10 shots. At full fire a Gun Tower uses one cartridge per second.
• It loads the cartridges in the order they lie in its inventory.
• If it has no ammunition for a few seconds, it shows the "no ammunition" icon, and a warning appears (see below).

A belt of cartridges past a row of Gun Towers, filled by grabbers, keeps a wall supplied without you.

Flame Tower

The Flame Tower needs no ammunition. Connect its pipe connection (rear right) to a supply of Light Oil (see Oil Processing and Fluids). It burns 3 units per second while it fires.

Rune Tower

The Rune Tower needs no ammunition either, but 1 MW of power from your grid (see Power). Without power it stops firing.

Walls

Walls are 1 block wide and 2 blocks high. They connect to neighbouring walls like fences, also across wall types, and to Gates. Creatures cannot climb over them: they have to break through, and while they do, your towers shoot at them.

	Wooden Walls	Brick Walls	Concrete Walls	Iron Walls	Reinforced Concrete Walls
Epoch	0	1	2	4	4
Unlocked by	Start	Masonry	Concrete	Fortification	Fortification
Health	350	700	1200	1800	3000
Recipe	3 Wood → 2	5 Brick	5 Concrete	4 Iron Plate + 1 Steel Plate → 2	4 Concrete + 1 Steel Beam → 2

Other buildings have less health. Belts, rails and pipes have only 60 to 180, most machines 250. Damaged buildings show cracks.

Gate

	Gate
Epoch	2
Unlocked by	Gates
Health	700
Recipe	1 Brick Walls + 2 Steel Plate + 2 Electronic Circuit

A Gate is a door in your wall. It opens when a player of its team walks up to it (within about 2.5 blocks) and closes again behind them. Creatures never open it, and players of other teams cannot either. Walls on both sides connect to it.

Repair Kit

	Repair Kit
Epoch	0
Unlocked by	Start
Effect	Restores 100 health of a damaged building, uses up one kit
Recipe	2 Iron Gear + 2 Electronic Circuit

Right-click a damaged building with a Repair Kit in your hand.

Rangertower

	Rangertower
Epoch	2
Unlocked by	Rangertower
Size	3 × 3
Power	300 kW
Range	160 blocks
Recipe	1 Trapped Outlander + 10 Steel Plate + 10 Wood + 5 Electronic Circuit

An Outlander scout sits in the lookout. While the tower has power, its telescope turns, and every nest and every attack group within 160 blocks is marked on your map. Groups on the move show up as "Creatures on the move", so you see an attack coming before it arrives.

Warnings

• "Your factory is under attack!" appears with a warning horn when creatures damage or destroy a building, or when a group sets off towards your factory. It names the area. Attacks in the same area are grouped into one warning.
• "A Gun Tower is out of ammunition" appears without sound while a tower shows its "no ammunition" icon.
• The same kind of warning is not shown again right away, so a long fight does not flood your screen.

See Status Icons and Warnings for all icons.

Tips

• Put Gun Towers behind walls, close enough that their 18 blocks cover the wall and a bit beyond.
• Defend the loud parts of your factory first. Attack groups aim for the noisiest place (see Noise and Unrest).
• Do not leave towers unsupplied. A wall without fire only delays the creatures.
• Upgrade cartridges: Steel Cartridges deal 60 % more damage in a Gun Tower.

See also

• Enemies
• Weapons
• Vehicles
• Teams and Raids