99 Nights in the Forest is a survival Roblox game, where you have to survive 99 days in a forest from a vicious Deer and its cultists. The latest update introduces Hard Mode to the game, especially for those who are willing to test their survival skills in challenging situations.
The Hard Mode is a new gameplay feature that was introduced in the latest update. This mode significantly ramps up the difficulty, making runs challenging yet more rewarding. However, playing Hard Mode is not as easy as you think, due to its complex mechanics. So, to help you out, here’s a complete guide to Hard Mode in 99 Nights in the Forest.
How to Play Hard Mode in 99 Nights in the Forest

Hard Mode in 99 Nights in the Forest can’t be activated while creating a party or starting a run. The only way to activate it is from the Research Outpost. After entering the world, you will need to use the map to locate the Research Outpost. Once you find the location, go inside and look to your left for a heavy steel door. Open it and make your way downstairs to arrive at the basement.
The basement is where you can activate the Hard Mode. However, depending on how many people are in your run, you will find either a single lever or multiple levers. Pulling these levers enables Hard Mode for the run. However, this option becomes functional once you’ve reached Day 3. However, the Research Outpost itself can be accessed as early as Day 1.
Once Day 3 is completed, Hard Mode officially begins with a cutscene. From that point onward, you can track active debuffs on the TV screens inside the Research Outpost. You will also start seeing rifts appear across the map, with corruption spreading further as each day passes, making survival increasingly challenging.
How to Control Corruption in 99 Nights in the Forest
Once Hard Mode is active, the Scientific Outpost will show your current Corruption Level along with all active Debuffs. Your primary objective is to keep the Corruption as low as possible while managing these negative effects. Currently, there are four Debuffs in the game, and up to three can be applied during a single run. Below, we’ve listed all the debuffs that are currently available in the game.
- Hungry Deer
- Passive Healing
- Cultist Waves
- Food Rot Spores
Managing the Corruption Level is crucial, and there are several effective ways to do it. One of the most important steps to controlling corruption is defeating corrupted animals and chopping down every corrupted tree you find across the map. This directly slows the spread and helps stabilize the corruption.
Moreover, you can open the Hard Mode Chest to obtain the Research Monitor Blueprint, which lets you track corruption level from anywhere. Make sure your team uses healing items like bandages and medkits efficiently to survive tougher encounters. Additionally, check for rift openings on your map, as corruption tends to spread rapidly around these areas.
Frequently Asked Questions (FAQs)
You must go to the Research Outpost, enter the basement through the steel door, and pull the levers found there. Hard Mode can only be activated after reaching Day 3.
Yes, the Research Outpost is accessible from Day 1, but Hard Mode will not start until Day 3 is completed.
You can reduce corruption by defeating corrupted animals, chopping corrupted trees, and monitoring rift areas using the Research Monitor Blueprint.
A cutscene plays, and the debuffs become active. Moreover, rifts appear on the map, and corruption begins spreading more aggressively each day if you don’t control them.
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