Lightning Grim Anticheat
by Axionize
Lightning Grim Anticheat is a Fabric server mod that checks player packets, movement, reach and inventory actions for cheating.
What it does
Installed on a server, the mod runs checks on incoming player actions and flags or corrects the ones that break game rules. Its checks cover hitting through walls and entities, reach distance, hitbox and collision handling, packet ordering and inventory interactions. The author describes it as a fork of GrimAC with faster reach checks, interact checks and several bug fixes.
The mod requires Fabric API, and the server must run Fabric. Lightning Grim Anticheat is also listed for Paper, Spigot, Bukkit, Purpur and Folia, which are server platforms rather than mod loaders. Files cover 1.7.2 – 26.2 across 83 release versions, and the latest Fabric file is 2.3.74-652f7c3-b100 for 26.1.2, dated 2026-10-01 on the alpha channel. The code is open source under the GNU General Public License v3.0 only, and public links exist for the source code, issue tracker and wiki.
Key features
Wall hit checks
Detects attacks made through solid walls, so hits that pass through blocks are rejected.
Entity pierce checks
Detects attacks that pass through other entities to reach a target behind them.
Reach calculations
Optimized reach checks measure how far a player can hit, with a stated reach limit of 3.0005.
Inventory and packet checks
Blocks use of crafting slots as extra storage, movement while an inventory is open, and packet ordering tricks used by noslow and autoblock cheats.
Compatibility
Latest build for each game version and loader.
26.x4 of 4 versions with builds
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
1.16.x5 of 5 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
BetterGrim is a Fabric mod for 1.7.2 – 26.1.2 under the GNU General Public License v3.0 or later, and it is open source. Panda Anti-Exploit is server-side only, open source under the CC0 1.0 Universal license, and published for 1.21.4 – 26.3. XaiAC is client-side only, is not open source, is licensed under the Apache License 2.0, and covers 1.21 – 1.21.11.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Lightning Grim Anticheat | Fabric | 1.7.2 – 26.2 | Not published | 2026-10-01 |
| BetterGrim | Fabric | 1.7.2 – 26.1.2 | Not published | 2026-04-24 |
| Panda Anti-Exploit | Fabric | 1.21.4 – 26.3 | Server-side only | 2026-10-12 |
| XaiAC | Fabric | 1.21 – 1.21.11 | Client-side only | 2026-04-23 |
Questions
Does Lightning Grim Anticheat need Fabric API?
Can Lightning Grim Anticheat run on Paper or Spigot?
Which game versions does the anticheat support?
In the catalog
Lightning Grim Anticheat is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 13,894 mods support Minecraft 26.2.
More from Axionize
Similar mods
What the author says
GrimAC is an open source Minecraft anticheat designed for 1.21.5 and supports 1.8-1.21.5. It can run on 1.8-1.21.5 and fully supports players connecting through ViaVersion on 1.7-1.21.x no matter the native server version. Geyser players are fully exempt. ### Current changes that upstream does not have (includes but…
Official listing
- Modrinth page
- modrinth.com/mod/lightning-grim-anticheat
- Owner
- Axionize
- Published
- 2024-10-03
- Updated on Modrinth
- 2026-10-01
- Facts verified
- 2026-10-15