Lightning Grim Anticheat
ModAn anticheat that helps server owners catch cheating players.
Why gradeA
How grades workStrengths
Points lost
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
Full points27 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.3 weeks ago (1 Oct 2026) 12 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.26.2 on Fabric. 72% of the 718 popular Fabric mods updated in the last 6 months also have files for 26.2. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 18 of the last 24 months 6 / 6Stability
Full points22 / 22Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.None of the 2 modpacks with two or more versions removed it 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not counted: it puts out releases very often, so quick fixes are normal for it 7 / 7Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
Full points10 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · Axionize/LightningGrim 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · Axionize/LightningGrim 3 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.167,612 3 / 4Track record
Full points8 / 8AgeHow long the project has existed. It counts less when no new file came out recently.2.1 years, 131 releases 8 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 5 latest files for recent Minecraft versions. See Security
70.1 of the 71 points that apply = 99 out of 100. The points above are rounded to whole numbers.
About
Lightning Grim Anticheat is a server-side anti-cheat fork of GrimAC, intended to detect cheating through more performant checks, with particular improvements to reach, block placement, and player interactions. Its checks cover movement, reach, knockback, falling, movement speed, scaffold and other block placement, inventory interactions, packet order, and attempts to hit entities or place blocks through walls or other entities. To evaluate movement, it simulates the player's possible actions, including walking, swimming, knockback, cobwebs, bubble columns, and riding boats, pigs, or striders, while accounting for collision shapes and differences between client and server versions. It maintains a separate replica of the world for each player and compensates for latency in world changes, movement, and inventory state, helping its checks handle delayed updates and packet-based fake blocks. Its asynchronous, multithreaded design is intended to handle large player populations, with movement checks and most listeners running on the network thread. Server staff can review violations and player session history, configure check categories and violation-triggered commands, and send alerts through in-game tools or Discord webhooks.
Written from Modrinth . How we write it
In-game changes
Changes the game's code in 7 areas, as a library other mods build on: Networking and multiplayerChanges 5 game code files in this area: connections, the server list and what is sent between your game and a server., Server and world logicChanges 5 game code files in this area: the world, commands, scoreboards, saved data and game rules., PlayerChanges 4 game code files in this area: your character: movement, abilities, hunger and controls., Chunk loading and storageChanges 2 game code files in this area: how the game loads, tracks, saves and unloads chunks., Mobs and their behaviorChanges 2 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Blocks and fluidsChanges 2 game code files in this area: how blocks, fluids and redstone work. and Other game codeChanges 4 game code files in this area: game code that is not in one of the areas above..
Libraries packed inside it change 7 more game code files: PacketEvents dependency for 1.14+, Cloud, PacketEvents dependency for 1.19+ compiled against 1.19.4 and 1 more.
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Details
Security
No harmful code found
We checked its files and read their code, without running it.
What it can do on your computer
- Connects to Discord
- The code contains a Discord webhook, an address that receives messages. Found in common, a library it includes.
- Connects to the internet
- It has code that can go online, for example to check for updates, load skins or send crash reports. Found in the mod's own code and in 5 libraries it includes. See Privacy
- Creates settings files
- The mod keeps its settings in the config folder of your game, where you can change or delete them. 11 files in your config folder.
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.5 latest files: the newest file for each Minecraft version and loader. All 5 are for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Looked for, not foundWe looked for these in the file and did not find them.Folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
Privacy
Sends usage statistics and unknown data
Sent to bstats.org, paste.grim.ac and an address built while the game runs.
Only some of its files send unknown data.
We found this in its code, read without running it.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of all 5 files, for recent Minecraft versions. See each file in Releases
- bstats.orgSends usage statistics.Usage statistics
- api.github.comChecks for a new version of the mod.From a bundled library.Nothing about you
- api.modrinth.comChecks for a new version of the mod.Nothing about you
- paste.grim.acPurpose not known.Unknown data
- Address built while the game runsThe code builds this address while the game runs: it is not written in the file.Checks for a new version of the mod.Unknown data
- Named in its filesA crash report or usage data service named in the files of the mod. The code does not show when or what is sent.The code names bStats, a service that receives usage data.
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
AI was used to make it
The author writes that AI was used.
We looked for AI tools in its texts, files and images and found none.
We have not read its code history yet.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content or AI features declared.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Not read yet
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Found20 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file1,463 code files read
Compatibility
See all 131 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with itModpacks that include Lightning Grim Anticheat in at least one of their versions, most downloaded first.
Latest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.