Infectious Smile Green Key Locations and Door Unlocks

Infectious Smile green key spawns in specific stages like Bacon Site 9 and Aquarium, or unlocks behind red doors in Lockers and Sewers. Players use this rare item to open green security rooms containing the Tommy Gun and Giant Potion.

Holding the green key makes you a high-priority target for both factions. If a player holding the key dies, the item drops on the ground at that exact spot, allowing anyone nearby to pick it up or hand it over to teammates. Tracking down this item requires navigating specific stage hazards, solving cooperative puzzles, or trading up from lower tiers tracked across standard key locations.

Standalone Green Key Stage Locations

Certain stages generate the green key directly without requiring an existing colored key in your inventory. These locations demand combat or puzzle completion instead of an item trade.

In Aquarium, players must break the central containment glass by pushing the structural beam. Once the glass shatters, the hostile shark inside must be eliminated. You can attack the shark from behind a wall or enter the tank directly. Once the shark is defeated, an access door opens to reveal the green key.

Bacon Site 9 houses a green key inside the Giant Laboratory. Head to the upper platform and press the wall button to summon an explosive bomb. Roll the bomb across the walkway toward the Bacon Scientists' holding cell to blast through the barrier. The explosion eliminates the melee researchers inside, but the yellow-clothed researcher survives and fires a revolver at approaching targets. The green key rests on a wooden crate inside the destroyed enclosure.

Warhead provides a timed opportunity to grab the key. When the missile detonates and triggers the structural collapse phase, an underground emergency hatch swings open. Dropping into this sublevel reveals fixed spawn markers for all three key colors, with the green key appearing on the lower flooring amidst the rising hazard.

Chained Office features a platform suspended by heavy chains that holds high-tier rewards. One method to retrieve the green key involves cooperative play: have a teammate pull the right-hand lever to lift the platform up to the rooftop level, allowing you to jump across, take the key, and ride it back down safely. An alternative solo route requires equipping a key ring, grabbing the key directly, and dropping into the void, which preserves your collected key upon respawning.

Red Key Exchange Rooms

Most green keys enter a match through exchange rooms, where players spend a red key to open locked compartments. These red keys are frequently traded up from a white key found in early platforming maps.

In Lockers, the red lock door can appear across the upper levels. Unlocking this door with a red key grants immediate access to the green key stored inside the locker compartment. Because multiple players frequently monitor this hallway, opening the lock when opponents are distracted prevents them from intercepting the prize.

Dropping Ball Slope contains a locked chamber located near the back of the incline. Inserting a red key opens the gate to collect the green key, though you must watch the narrow entry doorway for approaching hostile runners attempting to body-block your exit.

Sewers places its green key behind a red lock door situated directly above dangerous fluid hazards. Using the red key opens the lower control chamber. Inside, players collect the green key alongside a rusty shovel and access the drainage switch, which drains the liquid below and creates a safe walkway back up the stairs.

Greenhouse 01 allows an exchange while moving between the second basement floor and the first basement floor. The door marked with a red lock requires a red key to yield the green key. Avoid entering the adjacent side door, as an active security laser activates immediately upon crossing the threshold.

Where to Spend the Green Key

Green doors guard two of the strongest items available in the standard map pool: the rapid-fire tommy gun and the Giant Potion.

In Headcam, players must first detonate a bomb against the cracked section of wall. Once the rubble clears, use the green key on the reinforced door behind it. This room grants access to both the Tommy Gun and the consumable that triggers how to become a giant. Using the key also turns the observation floor opaque, which blocks the sightlines of enemies lurking beneath the glass.

Slime Room holds a locked room containing a Giant Potion. Locate the weak wall on the left side of the bridge, destroy it with an explosive bomb, and unlock the internal green door to claim the potion before the surrounding slimes divide and overwhelm the platform.

In Lockers, green doors generate on the second and third floors. Spending your green key here allows you to choose between securing the Tommy Gun or grabbing the Giant Potion. If high-tier weapons like a spare shotgun are already in your loadout, coordinating with teammates ensures someone else can drink the potion while you provide covering fire.

Route Comparison for Green Keys

Choosing where to acquire a green key depends on your current inventory, player count, and active stage selection.