Infection is a round, not the open roam. You are on SECTOR-04. Survivors have to stay alive until 6 AM. Infected players are trying to turn that roster before then.
The clock
At the start of a round, players are assigned to Survivors. There is a buying phase and a global dealer, which is the moment to spend the round's cash on a weapon you can actually hold. At 2 AM every survivor is marked, so hiding stops working as a plan by itself.
A private server can run Infection only with at least 8 players.
What the mode is for
The public badge Infection Survivor was for surviving as a human before 2025. It was released in December 2024 and the Roblox listing now marks it impossible. Do not farm the mode for that badge.
Infection has its own cash. Kills there are not the same wallet as SECTOR-07. A creator comment on the official return trailer also says the mode is poor as a money printer and more useful for levels. Use SECTOR-07 loot when the goal is cash.
A way to play it
The mode overview and a later player route agree on a few landmarks: a main street from spawn toward a church, scaffolding, the cafe, and a safe room. One condensed route, called Maze by its creator, holds the scaffolding early, falls back when the horde thickens around 2 to 3 AM, and saves scarce explosives for the last stretch. That path needs exact jumps. Treat the video as a demonstration, not as a guaranteed clear.
Ammo is the limit. The same route says to use melee while teammates are still up, and to check the survivor count so you know when the hold is about to collapse.
Gear the videos show
The November 30, 2024 overview walks through a token machine, a Tesla cannon, an M2 flamethrower, a reactor zombie, an Infection skin case, a revised UTS-15, and a Ray Gun. Those are update-video items. Prices and drop rules from that video are not copied here as current shop rows unless they also appear on the dealer or armory tables.
SECTOR-04 itself is on the worlds page.