NoChance - Multi-Layer Anti-Cheat

PacketEvents Required for 1.21.x PacketEvents

Note: Plugin can work without it but it may cause problems

Description

NoChance is a anti-cheat with a 4-layer validation cascade system and also with packet-level detection. Designed to catch cheaters while minimizing false positives through trust scoring, adaptive sampling, and statistical analysis.

Features

• 18 Detection Modules - Fly, Speed, KillAura, FastBreak, Reach, NoClip, Jesus, Blink, Timer, and more
• 4-Layer Validation System - Multi-stage verification to eliminate false positives
• PacketEvents Integration - Deep packet analysis for advanced cheat detection (1.21-1.21.8 support)
• Trust Score System - Players build trust over time, reducing false flags for legitimate skilled players
• In-Game GUI Configuration - Edit all settings via interactive menu, no file editing needed
• Database Support - SQLite & MySQL support with HikariCP connection pooling for optimal performance
• Staff Alerts - Real-time notifications with customizable thresholds and alert throttling
• Discord Webhooks - Send violation alerts directly to Discord with rich embeds
• Punishment System - Automatic kicks, warnings, and configurable actions
• Per-Check Configuration - Fine-tune every detection module independently
• Server Optimizations - Adaptive sampling, async processing, and batch operations

Commands

• /nochance menu - Open configuration GUI
• /nochance reload - Reload configuration
• /nochance info - View player statistics
• /nochance violations - View violation history
• /nochance reset - Reset player data
• /nochance toggle - Enable/disable specific check
• /nochance stats - View global statistics
• /nochance alerts - Toggle staff alerts

Aliases: /nc, /ac, /anticheat

Permissions

• nochance.admin - Access to all NoChance commands (default: op)
• nochance.alerts - Receive staff alert notifications (default: op)
• nochance.bypass - Bypass ALL anti-cheat checks (default: false)
• nochance.bypass. - Bypass specific check (default: false)

Individual Check Bypasses

• nochance.bypass.fly
• nochance.bypass.speed
• nochance.bypass.noclip
• nochance.bypass.jesus
• nochance.bypass.fastbreak
• nochance.bypass.fastplace
• nochance.bypass.nuker
• nochance.bypass.killaura
• nochance.bypass.nofall
• nochance.bypass.autoclicker
• nochance.bypass.reach
• nochance.bypass.inventory
• nochance.bypass.scaffold
• nochance.bypass.timer
• nochance.bypass.velocity
• nochance.bypass.criticals
• nochance.bypass.phase
• nochance.bypass.step
• nochance.bypass.blink

Default Config Preview

general:
  time_window_seconds: 60
  grace_period_seconds: 5
  min_samples: 5
  op_exempt: true
  notify_player_on_flag: true

thresholds:
  low_confidence: 0.70
  medium_confidence: 0.85
  high_confidence: 0.95
  extreme_confidence: 0.98

advanced_filtering:
  enabled: true
  bayesian_prior: 0.05
  z_score_threshold: 2.5
  min_trust_score: 0.3
  established_baseline_checks: 50
  established_baseline_time_seconds: 60

actions:
  kick_on_extreme_confidence: true
  kick_on_high_confidence: false
  warn_on_high_confidence: true
  warn_on_medium_confidence: true
  log_low_confidence: true

statistical:
  std_dev_multiplier: 3.0
  outlier_forgiveness: 3

performance:
  async_thread_pool_size: 4
  database_max_pool_size: 10
  database_min_idle: 2
  database_connection_timeout_ms: 30000
  database_idle_timeout_ms: 600000
  database_max_lifetime_ms: 1800000
  database_batch_size: 50
  database_batch_interval_ms: 500
  adaptive_sampling_enabled: true
  adaptive_sampling_warmup_checks: 100
  advanced_analysis_warmup_checks: 100
  advanced_analysis_strict_threshold: 500

checks:
  fly:
    enabled: true
    threshold: 4
    severity_multiplier: 2.2
    max_velocity_y: 0.52

  speed:
    enabled: true
    threshold: 5
    severity_multiplier: 2.8
    max_speed: 0.36
    sprint_multiplier: 1.32
    ice_multiplier: 2.6

  killaura:
    enabled: true
    threshold: 4
    severity_multiplier: 3.4
    max_reach: 3.2
    max_angle: 48.0
    max_rotation_speed: 650.0
    max_cps: 17.0
    cps_trusted_bonus: 2.0
    cps_untrusted_penalty: 2.0
    instant_flag_cps_over: 6.0
    angle_trusted_bonus: 8.0
    angle_untrusted_penalty: 5.0
    instant_flag_angle_over: 18.0
    rotation_trusted_bonus: 60.0
    rotation_untrusted_penalty: 50.0
    instant_flag_rotation_over: 140.0
    rotation_variance_threshold: 40.0
    rotation_variance_strict: 20.0
    required_violations: 2
    packet_variance_threshold: 25.0
    packet_variance_strict: 12.0
    packet_attack_rate_limit: 22

  fastbreak:
    enabled: true
    threshold: 10
    severity_multiplier: 1.8
    min_check_interval_ms: 25
    max_rapid_checks: 15
    trust_score_bonus: true
    require_multiple_systems: true
    base_tolerance_ms: 50
    percentage_tolerance: 0.10
    shovel_instant_tolerance_ms: 45
    shovel_instant_percentage: 0.25
    hand_instant_tolerance_ms: 28
    hand_instant_percentage: 0.18
    trust_bonus_instant_ms: 15
    trust_bonus_normal_ms: 50

database:
  type: SQLITE
  host: localhost
  port: 3306
  database: nochance
  username: root
  password: password
  table_prefix: nc_

discord:
  enabled: false
  webhook_url: ""

skill_profiles:
  low:
    max_cps: 9
    min_cps: 4
    max_rotation_speed: 220
    min_rotation_speed: 120
    max_accuracy: 0.52
    min_accuracy: 0.30
  medium:
    max_cps: 14
    min_cps: 9
    max_rotation_speed: 380
    min_rotation_speed: 220
    max_accuracy: 0.72
    min_accuracy: 0.52
  high:
    max_cps: 22
    min_cps: 14
    max_rotation_speed: 650
    min_rotation_speed: 380
    max_accuracy: 0.88
    min_accuracy: 0.72

Detection Modules

• Movement: Fly, Speed, NoClip, Jesus, Blink
• Block Interaction: FastBreak, FastPlace, Nuker, Scaffold
• Combat: KillAura, AutoClicker, Reach
• Other Checks: NoFall, Velocity, Criticals, Timer, Phase, Step
• Inventory: Inventory Movement Detection

Previews