NoChance Anti-Cheat

NoChance Anti-Cheat -----

Anti-cheat with trust-based system and 4-layer validation cascade system & packet analysis

PacketEvents Required for 1.21.x
PacketEvents
Note: Plugin can work without it but it may cause problems
https://nochance-ac.com/

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:

25+ Detection Modules - Fly, Speed, KillAura, FastBreak, Reach, NoClip, Jesus, Blink, Timer, ElytraFly, BoatFly, 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)
Bedrock/Geyser Support - Auto-detects Floodgate players with relaxed thresholds
Ping Compensation - Adjusts thresholds for high latency players to reduce false flags
Staff Tools - Spectate, freeze, and verbose mode for catching cheaters
Clickable Alerts - Click to teleport, hover for details, quick freeze/spectate buttons
Replay System - Records 30s buffer, saves violations for review
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, tempbans, and configurable actions
Per-Check Configuration - Fine-tune every detection module independently
Server Optimizations - Adaptive sampling, async processing, and batch operations

Commands:
• /nc menu - Open configuration GUI
• /nc reload - Reload configuration
• /nc info <player> - View player statistics
• /nc violations <player> - View violation history
• /nc reset <player> - Reset player data
• /nc toggle <check> - Enable/disable specific check
• /nc stats - View global statistics
• /nc alerts - Toggle staff alerts
• /nc spectate <player> - Spectate a player invisibly
• /nc freeze <player> - Freeze/unfreeze a player
• /nc verbose - Toggle verbose check output
• /nc profile <player> - View player profile and ping
• /nc replay list - List saved replays
• /nc replay play <file> - Watch a replay

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.<check> - Bypass specific check (default: false)
• nochance.staff.spectate - Use spectate command (default: op)
• nochance.staff.freeze - Use freeze command (default: op)
• nochance.staff.verbose - Use verbose mode (default: op)

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
nochance.bypass.noslow
nochance.bypass.badpackets
nochance.bypass.groundspoof
nochance.bypass.elytrafly
nochance.bypass.strider
nochance.bypass.boatfly

Default Config Preview

Code (YAML):

general:
time_window_seconds : 60
grace_period_seconds : 3
min_samples : 3
op_exempt : true
notify_player_on_flag : false

thresholds:
low_confidence : 0.65
medium_confidence : 0.80
high_confidence : 0.92
extreme_confidence : 0.97

advanced_filtering:
enabled : true
bayesian_prior : 0.08
z_score_threshold : 2.0
min_trust_score : 0.4
established_baseline_checks : 30
established_baseline_time_seconds : 45

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

checks:
fly:
enabled : true
threshold : 1
severity_multiplier : 2.5
max_velocity_y : 0.55

speed:
enabled : true
threshold : 1
severity_multiplier : 3.0
max_speed : 0.32
sprint_multiplier : 1.30
ice_multiplier : 2.4

killaura:
enabled : true
threshold : 1
severity_multiplier : 3.5
max_reach : 3.1
max_angle : 35.0
max_rotation_speed : 500.0
max_cps : 15.0

reach:
enabled : true
threshold : 1
severity_multiplier : 3.5
max_entity_reach : 3.15
max_block_reach : 4.5

# ... (20+ more checks with individual settings)

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

discord:
enabled : false
webhook_url : ""

replay:
enabled : true
buffer_seconds : 30
before_seconds : 10
after_seconds : 15
retention_days : 7
save_on_high : true
save_on_extreme : true

bedrock:
exempt : false
relaxed_checks : true
tolerance_multiplier : 1.3

ping_compensation:
enabled : true
high_ping_threshold : 120
max_multiplier : 1.4

skill_profiles:
low:
max_cps : 8
min_cps : 3
max_rotation_speed : 200
medium:
max_cps : 12
min_cps : 7
max_rotation_speed : 350
high:
max_cps : 18
min_cps : 11
max_rotation_speed : 550

Detection Modules