You are viewing a potentially older version of this package.
View all versions.
HardAntiCheat
Anti-cheat plugin for Atlyss multiplayer. (In Public Testing)
| Date uploaded | a week ago |
| Version | 2.4.2 |
| Download link | s0apysfederati0n-HardAntiCheat-2.4.2.zip |
| Downloads | 39 |
| Dependency string | s0apysfederati0n-HardAntiCheat-2.4.2 |
This mod requires the following mods to function
BepInEx-BepInExPack
BepInEx pack for Mono Unity games. Preconfigured and ready to use.
Preferred version: 5.4.2304
Marioalexsan-PerfectGuard
Work in progress anti-exploit plugin for Atlyss multiplayer.
Preferred version: 1.1.0
Nessie-EasySettings
A mod API for easily adding options to the settings menu.
Preferred version: 1.1.8README
HardAntiCheat
A powerful, configurable, server-side anti-cheat engine for Atlyss.
Join the Discord Community
This mod is a server-authoritative anti-cheat designed to block common exploits by making the server the source of truth for player actions. It is highly configurable, allowing hosts to tailor the detections to their server's specific mods and balance.
All detected infractions are logged with player details in the BepInEx\plugins\HardAntiCheat\HardAntiCheat_InfractionLog.txt file for server admin review.
Instructions
- Install Dependencies: This mod requires CodeTalker.
- Optional UI: Install EasySettings to configure the mod in-game via the "HAC Settings" tab.
- Run & Config: Run the game once to generate the config file at
BepInEx\config\com.HardAntiCheat.sftwre.cfg, or use the in-game UI.
Dependencies & Recommendations
| Mod Name | Status | Description |
|---|---|---|
| CodeTalker | REQUIRED | Handles secure networking for mod verifications. |
| EasySettings | Recommended | Adds an in-game settings menu to configure AntiCheat on the fly. |
| PerfectGuard | Compatible | Compatible soft-dependency for additional exploit protection. |
Configuration Settings
1. General
| Setting | Default | Description |
|---|---|---|
Enable AntiCheat |
✅ | Master switch to enable or disable all anti-cheat modules. |
Disable Detections for Host |
✅ | If true, the player hosting will not be checked. |
Trusted SteamIDs |
Comma-separated list of 64-bit SteamIDs for users who are exempt from checks. | |
Enable Mod Blacklist |
❌ | If true, kicks clients who have specific GUIDs loaded (requires CodeTalker handshake). |
Blacklisted Mod GUIDs |
Comma-separated list of forbidden Mod GUIDs (e.g. com.cheat.menu). |
|
Verification Timeout |
25.0 | Seconds the server waits for a client to send their mod list before kicking. |
2. Movement Detections
Validates player position and physics to prevent speed, teleport, and fly hacking.
| Setting | Default | Description |
|---|---|---|
Enable Teleport Checks |
✅ | Checks if players move faster than physically possible based on distance/time. |
Max Effective Speed |
100.0 | The max speed used for distance calculations. Increase if legit skills cause rubberbanding. |
Movement Grace Buffer |
10.0 | Distance buffer to account for dashes, knockbacks, and lag spikes. |
Teleport Threshold |
50.0 | Distance instantly flagged as a "Teleport" rather than a speed violation. |
Enable Fly Checks |
✅ | Detects players airborne for too long (10s limit). |
Enable Speed Stat Checks |
✅ | Prevents players from illegally modifying their base movement speed stat. |
Jump Threshold |
8 | Maximum consecutive jumps allowed before needing to touch the ground. |
3. Stats & XP
Validates character progression and resource gain.
| Setting | Default | Description |
|---|---|---|
Enable XP Checks |
✅ | Prevents players from gaining impossible amounts of XP. |
Max XP Gain |
77000 | Max XP allowed in a single transaction/kill. |
Max XP Rate |
150000 | Max total XP allowed within the defined time window. |
XP Window |
30.0 | Time window (seconds) for the XP Rate check. |
4. Combat & Spam
Enforces cooldowns and prevents macro-spamming of items and actions.
| Setting | Default | Description |
|---|---|---|
Enable Cooldown Checks |
✅ | Prevents using skills faster than their base cooldowns allow. |
Enable Revive Checks |
✅ | Prevents players from calling self-revive or replenish without authorization (Angela's Tear). |
Enable Spam Checks |
✅ | Master switch for input rate limiting (Items, Swaps, Blocks). |
Min Consumable Interval |
0.4 | Minimum seconds between using items (prevents potion spam macros). |
Min Weapon Swap Interval |
0.25 | Minimum seconds between weapon swaps. |
Min Block Interval |
0.1 | Minimum seconds between block inputs (Prevents "Perfect Guard" bots). |
5. Punishments
Configure automatic server actions for players who accumulate too many infractions.
| Setting | Default | Description |
|---|---|---|
Enable Auto-Punish |
✅ | Automatically kicks or bans players after the limit is reached. |
Infractions Limit |
5 | Number of warnings allowed before action is taken. |
Action Type |
Kick | The action to take (Kick or Ban). |
6. Logging
| Setting | Default | Description |
|---|---|---|
Enable Detailed Logs |
✅ | Master switch for detailed infraction logs. |
Log Player Name/ID |
✅ | Include player identity in logs. |
Max Log File Size (MB) |
5 | Archives the log file on startup if it exceeds this size. |
CHANGELOG
Changelog
v2.4.x - Menu Overhaul - 3/3/26
-
Changed Enable Mod Blacklist to false by default.
-
Added the Nessie.ATLYSS.EasySettings soft dependency.
-
Implemented the AddSettings UI so you can configure everything in-game (including text fields for SteamIDs and blacklists, and dropdowns for punishment types).
-
Updated README.md fully.
-
Bug Fixes:
- Should fix the bug where the menu is straight up not appearing
Old Updates
v2.3.x - The Stability & Behavioral Overhaul - 1/18/26
Major Networking & Logic Rewrite
- Fixed Connection Issues: Switched handshake networking to Binary P2P (SteamNetworkingMessages). This resolves the
k_EResultInvalidParamerrors and prevents players from timing out while loading into the server. - Integrity Logic Change: Removed "Strict Hashing" integrity checks which were causing false positives for vanilla players or those with different mod versions.
- New Mod Enforcement: Switched to a Blacklist System. The server now accepts all mods by default and only kicks clients if they have a specific GUID listed in the
BlacklistedModGUIDsconfig. - New Behavioral Detections:
- Infinite Stamina: Detects players sprinting without losing stamina.
- Consumable Spam: Prevents using items faster than humanly possible (Macro detection).
- Weapon Swap Spam: Prevents animation canceling via rapid weapon switching.
- Parry Botting: Detects inhuman block input speeds.
- Crash Fixes: Resolved
NullReferenceExceptionerrors in the movement validation patch. - Stability: Added a safety delay to the handshake to ensure the player object is fully initialized before checking.
- Bug Fixes:
- fixed a bug that was lingering like a fly, server reinit re registration
- Updated Readme for more clarification (2/14)
Public Test Updates (Pre-v2.3.0)
- Codetalker Update: Updated dependencies to latest version - 1/17/26
- Validation Improvements: Made validation abide by Thunderstore policy (reading names + GUIDs) - 11/22/25
- Game Update: Updated compatibility for latest game patch - 1/11/26
- Fixes: Fixed missing detections and extended verification length - 10/14/25
- SteamID: Added Whitelist/Blacklist for SteamIDs - 10/12/25
v2.2.0 - Refactory
- Fixed "Players getting railed on skill init" bug.
- Fixed fly/movement checks and host boolean logic.
- Added logging configuration choices.
- Patched Teleportation by call.
- Airborne Check: Added height limiting check.
- Revive Fix: Fixed revive detection logic (Angela's Tears requirement).
- Currency: Added Currency Add Check back.
- Syncing: Added CodeTalker Anti-Cheat Syncing.
v1.0.7 - Bugfix
- Fixed skill initialization issues.
v1.0.6 - Stability & Feedback
- Fixed Critical Initialization Bug: Dynamic Haste ID detection moved to correct loading point.
- Log Archiving: Added automatic log archiving to prevent massive file sizes.
- Announcements: Added public punishment announcements to chat.
- Confirmation: Added server start confirmation message.
v1.0.5 - Lag Compensation Fix
- Movement: Overhauled movement detection to be tolerant of lag.
- Config: Added
Max Effective Speed,Grace Buffer, andTime Thresholdconfigs. - Speed Hack: Improved detection using dynamic baseline recording.
- Vulnerability Fix: Corrected cast time validation for instant-cast skills.
- Paths: Standardized log file paths.
v1.0.4
- Intelligent Skill cooldown check improvement.
- Flagged speedhack properly.
v1.0.3
- General bug fixes.
v1.0.2
- Airborne check re-enabled.
v1.0.0
- Initial release.
