Build and Survive gives humans five daylight minutes to build, then five night minutes against Smilers who spawn with bombs. Last the night for 80 Smile Coins. If every human is infected, the host Smiler receives 70 and the expedition resets to day 1. Each kill or infection adds 5 coins. A grab followed by a bomb self-destruct adds 15.
Standing on the white Smiler pad during the day raises your chance of becoming the first Smiler, up to about 40 percent. Staying away leaves the chance near 11 percent.
Body and blocks
Daytime jump height is 7 blocks and fall damage is off. At night, jump height drops to 2 blocks, so a stair that touches the ground is a Smiler ladder. You start with 55 Wood, 25 Concrete, and 7 Steel. Bought blocks stay until you leave the server. Unlocking a category stays. VIP unlocks TNT, listed at 50 coins each in Build and Survive.
A bomb removes 50 durability from every block in the blast.
| Block | Durability | Bombs to break | Unlock | Each extra block |
|---|---|---|---|---|
| Wood | 100 | 2 | free | 1 coin |
| Concrete | 200 | 4 | free, 25-block cap, not rebought | none |
| Steel | 300 | 6 | free | 18 coins |
| Metal Truss | 150 | 3 | 100 coins | 20 coins |
| Laser Shield | 50 | 1 | 300 coins | 75 coins |
| Grate Trap | 100 | 2 | 250 coins | 40 coins |
| Shotgun Turret | 100 | 2 | 110 coins | 6 coins |
The Halloween update reduced the daily block reset, added the Rusted Skyscraper structure, and rebalanced blocks. Treat the prices above as the pre-rebalance public table and check the mode shop if a number changed.
Lifts that do not feed the ground
Rockets unlock for 250 coins, cost 70 each, and cap at 8. They push the build opposite the black exhaust. Fans unlock for 500, cost 20 each, and cap at 6. A fan lifts players, not blocks.
For a fan shaft: stone or steel floor, fan facing up, a four-wall chimney, a lever or battery, an opening on the defense floor, and a ceiling so people do not fly into the fog. Put a laser above the fan or cover the fan when you are not using it. Smilers ride open updrafts.
A spinner uses a wheel, arms of normal blocks, rockets on the outer blocks, spikes or Laser Gates on the arms, and a lever. Contact with the moving hazard kills. Laser Gates kill humans too. Do not walk through your own beam.
Night rules of thumb
- Do not connect a ladder to the ground.
- Put Steel under the core and Wood on expendable walkways.
- Keep one enclosed lift and one weapon. Base weapons are limited unless the team buys crates. VIP still has the Knife.
- Consecutive days move the map through mountains, cliffs, and ice that breaks when night starts. A wipe sends the server back to day 1.