Outlast Trials Chemical Leak Event Tokens Guide

The Outlast Trials chemical leak event is a limited-time in-game occurrence where a toxic gas, the “Chemical Leak,” spreads across the trial maps, forcing players to wear gas masks and complete objectives under a time limit. Event Tokens are the currency earned by completing these special trials, and they are used to unlock exclusive cosmetics and consumables in the event-specific reward catalog. Here is how the event works and what you need to know about earning and spending Tokens.

Background: What Is the Chemical Leak Event?

The Chemical Leak event is a seasonal or limited-time program in The Outlast Trials, the cooperative survival horror game by Red Barrels. It was first introduced as part of the game’s post-launch content updates, typically running for a few weeks. The event revolves around a malfunction at the Sinyala Facility’s chemical storage, which floods the trial areas with a toxic gas. Unlike the standard trials, the Chemical Leak event adds a persistent environmental hazard that changes how you approach each mission.

The event is tied to the game’s overall narrative of the Murkoff Corporation’s experiments, where reagents (the player characters) are subjected to increasingly brutal and bizarre trials. The leak is presented as another layer of “therapy,” forcing you to complete objectives while managing a limited oxygen supply. The event is usually announced through the game’s patch notes and in-game menu, and it appears on a rotating schedule alongside other special events like the Winter Kills or the Toxic Shock.

How the Chemical Leak Event Works

When the event is active, a new trial type becomes available in the Trials menu, marked with a biohazard icon. The core mechanic is the gas mask: you start each trial with a mask that has a finite oxygen tank. The gas fills the entire map, so you cannot simply avoid it—you must manage your oxygen levels while completing the trial’s objectives.

Oxygen is consumed continuously while you are in the gas. You can refill it by finding oxygen canisters scattered around the map, which are usually located near objectives or in side rooms. The canisters are limited, so you need to plan your route and prioritize objectives. If your oxygen runs out, you begin to take damage and will eventually die unless you find a canister or reach a safe room (which are rare and often locked).

The trial objectives are the same as the standard versions—such as collecting evidence, turning valves, or escorting a rig—but the gas adds a constant pressure. Enemies also behave differently: some, like the Grunts, are unaffected by the gas, while others, like the Night Shift, may be more aggressive. The event also introduces a unique enemy type, the “Gas Man,” who patrols the map and can disable your mask temporarily, forcing you to find a new one.

The event has a separate difficulty modifier: you can choose to play on Standard, Intensive, or Psychosurgery difficulty, with higher difficulties providing more Tokens but also reducing the number of oxygen canisters and increasing enemy aggression.

What Are Event Tokens and How Do You Earn Them?

Event Tokens are a special currency that only exists during the Chemical Leak event. They are separate from the standard in-game currency (Stamps) and the premium currency (Coins). Tokens are earned by completing event trials, with the amount based on your performance and difficulty.

Here is how Token rewards are calculated:

• Base reward: Completing a trial on Standard difficulty grants 10 Tokens. Intensive grants 15, and Psychosurgery grants 20.
• Objective bonus: Each optional objective completed (e.g., finding all evidence, not triggering alarms) adds 2-5 Tokens.
• Survival bonus: Finishing with more than 50% oxygen remaining adds 3 Tokens.
• Co-op bonus: Playing with at least one other player adds a 25% multiplier to the total (rounded down).
• First-time bonus: The first time you complete a specific trial during the event, you earn double the base reward.

For example, completing a Standard trial with all objectives and 60% oxygen remaining, solo, would give you 10 + 5 + 3 = 18 Tokens. Playing the same trial with a friend would give you 18 * 1.25 = 22.5, rounded down to 22 Tokens. The first-time bonus would double the base, so 10 * 2 = 20, plus 5 + 3 = 28, then multiplied by 1.25 for co-op = 35 Tokens.

Tokens are automatically added to your event balance when you finish the trial, and you can check your total in the event menu.

How to Spend Event Tokens

Event Tokens are spent in the event-specific reward catalog, which is accessible from the main menu during the event. The catalog contains a rotating selection of items, typically including:

• Cosmetic items: Gas mask skins, jumpsuit variants, and player icons with a biohazard theme.
• Consumables: Health syringes, antidotes (which give temporary immunity to the gas), and stamina boosters that can be used in any trial.
• Exclusive blueprints: These unlock permanent recipes for crafting items in the hub area, such as decorative items for your cell.

Prices range from 50 Tokens for a basic icon to 500 Tokens for a full cosmetic set. The catalog is divided into tiers, and you must purchase items in a tier to unlock the next one. Some items are only available for a limited time within the event, so you need to prioritize what you want. Any unspent Tokens do not carry over to the next event; they are converted to Stamps at a rate of 1 Token = 10 Stamps when the event ends.

Common Problems and How to Avoid Them

Players often run into a few issues during the Chemical Leak event. Here are the most common and how to handle them:

• Running out of oxygen: The biggest mistake is not memorizing canister locations. Before starting a trial, take a moment to scout the map (if you have the upgrade that reveals items) or watch for the green glow of canisters. Always have a backup canister in mind for the final objective.
• Getting cornered by enemies while low on oxygen: The gas masks make it harder to hear enemy footsteps. Use the “listen” ability (if unlocked) or play with a friend who can watch your back. If you are low on oxygen and an enemy is chasing you, try to break line of sight and hide in a locker—but be aware that the gas still drains your oxygen while hiding.
• Not earning enough Tokens: If you are short on Tokens, focus on completing the optional objectives and playing on a higher difficulty. Also, make sure to complete each trial at least once for the first-time bonus, as that doubles the base reward.
• Event not appearing: The event is time-limited and often requires the latest game update. If you do not see the event, check for updates and verify your game files. Also, note that the event may be region-locked in some cases, but this is rare.

Comparison to Other Events

The Chemical Leak event is similar in structure to other limited-time events in The Outlast Trials, such as the “Winter Kills” (Christmas-themed) and “Toxic Shock” (which also involved a poison). The key difference is the oxygen management mechanic, which adds a survival layer that is not present in the standard trials or other events. In Winter Kills, for example, the focus was on collecting gifts and avoiding a special enemy, but there was no constant resource drain. The Chemical Leak is more demanding because it forces you to move quickly and prioritize objectives, making it a good challenge for experienced players.

Compared to the standard trials, the event trials also offer better rewards (Tokens can be converted to Stamps at a favorable rate), but the difficulty is higher. If you are new to the game, it is recommended to complete the standard trials first to learn the maps and enemy patterns before attempting the event on Intensive or Psychosurgery.

Safety and Fair Play Notes

While the event is fictional, the developers have included a few safety features for players:

• No real-world gas exposure: The game uses virtual gas, and the masks are purely cosmetic. There is no actual health risk.
• Accessibility options: The game offers colorblind modes and subtitle options that can help you spot canisters and hear audio cues better.
• Anti-frustration features: If you die during an event trial, you do not lose your progress on the trial—you respawn at a checkpoint, but you lose any Tokens you would have earned for that run. However, you can retry as many times as you want without penalty.

There is no real-world safety concern, but it is worth noting that the event can be stressful, so take breaks if you feel overwhelmed.

Frequently Asked Questions

Do Event Tokens carry over to the next event?

No. Event Tokens are only valid for the current event. When the Chemical Leak event ends, any unspent Tokens are automatically converted to Stamps at a rate of 1 Token = 10 Stamps. So it is best to spend them before the event ends.

Can I play the Chemical Leak event solo?

Yes, you can play solo. However, the co-op bonus (25% more Tokens) only applies when you play with at least one other player. Solo play is possible, but the oxygen management can be harder because you have no one to watch your back.

What is the fastest way to earn Tokens?

The fastest way is to play on Psychosurgery difficulty with a full squad of four players, completing all optional objectives and finishing with high oxygen. This can net you around 60-70 Tokens per trial. However, if you are not skilled enough, playing on Standard with a friend is more efficient than repeatedly failing on a higher difficulty.

Are the event items exclusive to the event?

Yes, most cosmetic items and blueprints are exclusive to the event and cannot be obtained after it ends. However, Red Barrels has occasionally brought back older event items in later events, but this is not guaranteed. If you want an item, it is best to earn it during the event.

Why is the gas mask not working?

If your gas mask stops working, it is likely because the Gas Man enemy has disabled it. You will see a warning icon on your screen. You need to find a new mask, which is usually located in a locker or on a table. The mask will be highlighted with a green outline. Also, make sure your oxygen tank is not empty—if it is, you need a canister to refill it.

Can I earn Tokens outside of the event trials?

No, Tokens are only awarded for completing event trials. Standard trials, escalation therapy, and other game modes do not award Tokens. However, you can earn Stamps and Coins from those modes, which you can use to buy other items.

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