NovaAC

Hybrid anticheat for Minecraft 1.21.4 Java and Bedrock/Geyser servers

NovaAC combines packet analysis, server-side physics simulation, combat heuristics, Bedrock/Geyser compatibility, replay tools, staff utilities, plugin-hiding protection and adaptive false-positive filtering.

It is designed as a support anticheat for servers already using GrimAC, Vulcan or similar solutions. NovaAC focuses on Bedrock compatibility, moderation tools, packet analysis and additional detection coverage. It can also run standalone.

Dependencies

Engine Features

• Movement simulation — Server-side movement and physics validation
• Reach compensation — Handles ping, knockback, movement history, hitboxes and desynchronization
• TPS-adaptive processing — Adjusts processing during server performance drops
• Combat analysis — Combines aim, click, rotation and attack-pattern checks
• False-positive protection — Uses buffers, player state, latency and multiple detection signals
• Replay tools — Review recorded suspicious movement in-game
• Bedrock compensation — Adapts checks for Geyser and Floodgate players
• Selective async processing — Moves suitable validation work away from the main server thread

Detection Coverage

NovaAC includes more than 120 configurable checks covering combat, movement, blocks, exploits, protocol behavior and Bedrock players.

Combat

AimAssist, AimLock, AimSnap, AnchorAura, AttackCooldown, AutoArmor, AutoBlock, AutoClick, AutoClicker, AutoEat, AutoSoup, AutoTool, AutoTotem, AutoTrap, BadPackets, BedDefender, ClickPattern, Criticals, CrystalAura, FastBow, FastBreak, FastEat, Hitbox, InventoryCombat, KillAura, MaceDMG, MultiAura, PotionSpoof, Reach, RotationEntropy, Velocity and WTap.

Movement

AirJump, AntiDisabler, AntiLevitation, AntiVoid, AutoJump, AutoShift, BadPackets, Baritone, BedLeave, Blink, BoatFly, BoatLongJump, BoatSpeed, Bounce, ClickTP, Elytra, ElytraFly, EntitySpeed, FastClimb, Fly, GroundSpoof, HighJump, InvalidSprint, Jesus, LongJump, NoClip, NoFall, NoSlow, NoWeb, PacketOrder, Parkour, Pathing, Phase, PlayerInput, SafeWalk, Scaffold, Simulation, Slippy, Sneak, Speed, Spider, StatisticalAnomaly, Step, Strafe, Timer, VehicleControl, Velocity, XRay and other movement checks.

Block and World

AirPlace, BlockInteraction, BlockReach, BreakDelay, ChestStealer, FastBreak, FastPlace, GhostHand, HardnessNuker, LiquidAirPlace, NoSwingBreak, Nuker, Scaffold, TowerBuild and XRay.

Exploit and Miscellaneous

AntiReducedDebugInfo, Backtrack, Cinematic, DuplicatePackets, Interact, Inventory, Macro, PayloadIntegrity, PluginHider, Protocol, RateLimit, SimulationDrift and TickBase.

Bedrock and Geyser

Bedrock AimAssist, AutoClicker, Fall, Fly, Hitbox, Jitter, Jump, KillAura, NoSlow, Reach, Speed, Step, AckDebt and FalsePositiveProtection.

Bedrock-specific compensation is also applied to other checks when necessary to reduce false positives caused by translated or client-specific movement.

Staff Features

Commands

Permissions

Requirements

Installation

1. Install Java 21 or newer.
2. Install PacketEvents 2.7.0 or newer.
3. Place NovaAC.jar in the server's plugins folder.
4. Start the server.
5. Configure optional integrations and punishment settings.

Privacy

• Detection data, violations, replays and logs are stored locally.
• The optional update checker contacts Spigot.
• Discord data is sent only when an administrator enables and configures a webhook.
• bStats collects anonymous server statistics such as plugin version, Minecraft version, Java version and server software.
• bStats can be disabled in /plugins/bStats/config.yml.

Support

• Discord: https://discord.gg/zdvaKxjShz
• Ko-fi: https://ko-fi.com/alpha16

Disclaimer

NovaAC is provided as-is. False positives may occur depending on server version, plugins, latency, Bedrock translation and configuration.

Test punishment settings before enabling automatic punishments in production. Report bugs and false positives through Discord.

Do not decompile, tamper with or modify the plugin without permission.