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Game guide
Infectious Smile Guide: The two sides and the basic goal
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About
OverviewInfectious Smile is a Roblox horror survival game where one team of Smilings tries to infect every Human player, while Humans fight back with weapons to survive. This guide covers the core rules, how each side plays, the Build and Survive mode, and how to earn and spend Smile Coins.
What is on this page
Contents
01
The two sides and the basic goal
Table
In short
Every round is a tug-of-war between growing Smiling numbers and Humans trying to hold them off.
Each round splits players into Humans and Smilings. Smilings grab Humans to infect them, pulling them onto the Smiling team. Humans carry weapons and try to cut down Smilings before anyone else gets turned.
| Humans | fight Smilings with weapons and try to stay uninfected until the round ends |
| Smilings | grab Humans to infect them and grow the Smiling team until everyone has turned |
| Spawn area | a fixed area always present in the map where players begin each round |
| Fortress | a permanent landmark on the map |
MetaNew Player Survey
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02
Playing as a Human
TipsIn short
Hitting Smilings earns Smile Coins, so staying active with your weapon pays off even when you are retreating.
Humans use melee and ranged weapons to damage or kill Smilings. Each hit earns Smile Coins, with harder-hitting weapons earning more per hit. Weapons cannot be picked up a second time, so treat what you have as permanent for the round.
Tips worth knowing
- Every hit on a Smiling earns you Smile Coins — keep swinging instead of just running
- Standing under a block lowers your smile chance by 10%, down to a minimum of 1%
- You cannot pick up a weapon a second time
03 Live and upcoming events
Events
Events running now or coming soon. They have fixed dates, so check them first.
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04
Playing as a Smiling
TipsIn short
Every successful infection makes your team stronger for the rest of the round.
Smilings grab Humans to drain their health and eventually infect them. Each tick while grabbing a Human earns 1 Smile Coin, plus 5 more on a successful infection.
Tips worth knowing
- Every tick you spend grabbing a Human earns you 1 Smile Coin, so holds are worth finishing
- A successful infection earns 5 extra Smile Coins on top of what you collected during the grab
05
Build and Survive mode
Step
In short
A C4 night can swing the whole match, so knowing how to defuse it is the single most important piece of mode-specific knowledge.
Build and Survive runs in two phases: five minutes to build a base, then five minutes to hold it. A thick black fog surrounds the map once survival starts, and touching it turns you into a Smiling. Smilings in this mode receive Modifiers — Timebombs, Jump Potions, Tasers, and the Overseer Modifier — to tear your base apart. Any Human who dies respawns as a Smiling.
- Prepare phase use the first five minutes to build structures
- Fog awareness stay away from the black fog at all costs; contact turns you into a Smiling instantly
- Day 5 threat Smilings may begin carrying Firebombs that set wood alight and can burn an entire connected wooden structure
- Day 7 threat Mega Timebombs arrive and can destroy spike traps, electrical weapons, and sentries in a single blast; the Smiling carrying one is slowed to walkspeed 5 while holding it
- C4 night when a destroyed flag spawns, at 2:30 a random Smiling receives a C4 that explodes after 60 seconds and wipes all structures in a huge radius
- Defuse the C4 reach and defuse it before the 60-second timer runs out; the defuser earns 25 Smile Coins, experience, a forcefield, a buffed Tommy Gun, an Ice Potion, and an Invisibility Potion
06
Earning and spending Smile Coins
CheckIn short
Smile Coins fund everything in the shop.
Smile Coins are the only currency in the game. You spend them at the Shop — the black button with a white cart icon on the right side of your screen — on weapons, skins, Modifiers, and Animations. Skins and effects only change how a weapon looks and never alter its damage or stats. Animations change how your character holds a weapon or reacts to infection, with no level requirement to equip them.
- Hit Smilings as a Human each hit gives coins, and higher-damage weapons give more per swing
- Hold a Human as a Smiling you earn 1 coin per tick and 5 on a successful infection
- Defuse a C4 in Build and Survive instant reward of 25 Smile Coins plus experience
- Modifiers bought in the Shop affect every player in the server
07
Stages and the map layout
SummaryIn short
Up to four stages can be active at once, so each round's map feels different even on a map you know well.
The map always contains certain fixed areas, including the Spawn and the Fortress. On top of those, up to four stage slots fill in with rotating stages that each have their own layout and functions. The Summer update added two new maps and reworked one existing map, including a rebalanced water map for Build and Survive.
- Fixed areas the Spawn and Fortress are always present every round
- Rotating stages up to four stage slots fill with different layouts each round
- Water map rebalanced in the Summer update
- New maps two maps were added in the Summer update
Glossary
Glossary- Smiling
- An infected player who grabs Humans to spread the infection and grow the Smiling team.
- Human
- An uninfected player who uses weapons to fight Smilings and survive the round.
- Smile Coins
- The in-game currency used to buy weapons, skins, Modifiers, and Animations from the Shop.
- Modifier
- A shop item that changes gameplay conditions for all players in the server when activated.
- Timebomb
- A Smiling tool in Build and Survive used to blow up Humans' structures.
- C4
- A powerful explosive placed by a Smiling on certain C4 nights in Build and Survive that destroys all structures in a large radius after 60 seconds unless a Human defuses it.
- Smile chance
- A value representing how likely you are to be infected; standing under a block reduces it by 10%, and the minimum possible value is 1%.
- Build and Survive
- A game mode where Humans spend five minutes building a base, then five minutes defending it against Smilings.
Common questions
FAQWhat happens if I die in Build and Survive?
When a Human dies in Build and Survive, they respawn as a Smiling for the rest of that round.
Do skins or animations make me stronger?
No. Skins and effects only change how a weapon looks, and Animations only change how your character holds a weapon or reacts to infection. Neither affects damage or any other stat.
How do I reduce my chance of getting infected?
Stand under a block to cut your smile chance by 10%. The minimum smile chance is 1%.
What is the fastest way to earn Smile Coins as a Smiling?
Find a Human and hold your grab for as long as possible, since you earn 1 Smile Coin every tick during the hold. Completing the infection adds 5 more Smile Coins on top of whatever you collected while grabbing.
Updated Sep 11, 2026
Game updates can change what is on this page. If you spot something, get in touch and let us know.
Game updates can change what is on this page. If you spot something, get in touch and let us know.
