introduce
The Fourth Option (New version)_
The Fourth Option (New version)Latest complete chapter list
Main text volume
Chapter 1: Last Ship Home
Chapter 2: The Council Falls
Chapter 3: Class Divisions
Chapter 4: Helena’s Dilemma
Chapter 5: The Signal
Chapter 6: The Original Seven
Chapter 7: Strategic Alliance
Chapter 8: The Game Corrupted
Chapter 9: Seeds of Rebellion
Chapter 10: Subject L7
Chapter 11: Crisis and Rescue
Chapter 12: New Beginnings
Chapter 13: Community Debate
Chapter 14: Divergent Paths
Chapter 15
Chapter 16: The Price of Potential
Chapter 17: Winter of Loss
Chapter 18: Separation
Chapter 19: Helena’s Network
Chapter 20: First Technical Achievement
Chapter 21: Forbidden Footage
Chapter 22: Activation Day Approaches
Chapter 23: Alexander’s Activation
Chapter 24: Elijah’s Departure
Chapter 25: Lyra’s Processing
Chapter 26: Alexander’s Arrival- Floor 1
Chapter 27: Basic Game Mechanics (Floor 1)
Chapter 28: Resource Management & Survival Foundations (Floor 1)
Chapter 29: Team Assembly & Role Definition (Floor 1)
Chapter 30: The Killing Quota (Floor 1)
Chapter 31: The First Kill (Floor 1)
Chapter 32: Interface Discovery (Floor 1)
Chapter 33: Corporate Monitoring (External)
Chapter 34: Helena’s Observation (External)
Chapter 35: Elijah’s Awakening (Floor 1)
Chapter 36: Combat Training (Floor 1)
Chapter 37: Environmental Adaptation (Floor 1)
Chapter 38: The Loner’s Path (Floor 1)
Chapter 39: Village Interactions (Floor 1)
Chapter 40: Survival Tactics (Floor 1)
Chapter 41: Labyrinth Preparation (Floor 1)
Chapter 42: The Newcomer’s Path (Floor 1)
Chapter 43: Labyrinth Completion (Floor 1)
Chapter 44: Root Warden Signs (Floor 1)
Chapter 45: Root Warden Battle (Floor 1)
Chapter 46: Stealth Mechanics (Floor 2)
Chapter 47: Darkness Adaptation (Floor 2)
Chapter 48: The Rooted Maze (Floor 2)
Chapter 49: Three-Dimensional Navigation (Floor 2)
Chapter 50: Echo Systems (Floor 2)
Chapter 51: Tunnel Ecosystem (Floor 2)
Chapter 52: Tunnel Predators (Floor 2)
Chapter 53: Resource Extraction (Floor 2)
Chapter 54: Guardian Warning Signs
Chapter 55: Tunnel Serpent Guardian (floor 2)
Chapter 56: Environment Shift (Floor 3)
Chapter 57: Training Stations (Floor 3)
Chapter 58: The Grass Hedge Trials (Floor 3)
Chapter 59: Changing Maze (Floor 3)
Chapter 60: Village Center (Floor 3)
Chapter 61: Settlement Mechanics
Chapter 62: Resource Competition (Floor 3)
Chapter 63: Quota Strategy (Floor 3)
Chapter 64: Elder Thorne’s Quest (Floor 3)
Chapter 65: Meadow Colossus Guardian (floor 3)
Chapter 66: Ascension Preparation (Floor 3)
Chapter 67 : Darkness Mechanics (Floor 4)
Chapter 68: Bioluminescence (Floor 4)
Chapter 69 : The Luminous Depths (Floor 4)
Chapter 70 : Underground Pools (Floor 4)
Chapter 71 : Betrayal and Separation (Floor 4)
Chapter 72: Hunter Confrontation (Floor 4)
Chapter 73 : Fateful Intervention (Floor 4)
Chapter 74: Unexpected Rescue (Floor 4)
Chapter 75 : Uneasy Alliance (Floor 4)
Chapter 76: Initial Assessment (Floor 4)
Chapter 77: Complementary Skills (Floor 4)
Chapter 78 : Team Integration(Floor 4)
Chapter 79 : Approaching Guardian (Floor 4)
Chapter 80 : Luminous Horror Guardian(Floor 4)
Chapter 81 : Environment Transition (Floor 5)
Chapter 82: Healing Knowledge (Floor 5)
Chapter 83: The Botanical Puzzlebox (Floor 5)
Chapter 84 : Toxin Mechanics (Floor 5)
Chapter 85 : Poison Resistance (Floor 5)
Chapter 86: First Trust (Floor 5)
Chapter 87 : Valeria’s Suspicions (Floor 5)
Chapter 88: Advanced Herbalism (Floor 5)
Chapter 89 : Garden Keeper Signs (Floor 5)
Chapter 90 : Garden Keeper Guardian (Floor 5)
Chapter 91 : Nighttime Revelations (Floor 5)
Chapter 92 : Disaster Environment (Floor 6)
Chapter 93 : Environmental Hazards(Floor 6)
Chapter 94: The Broken Pathways (Floor 6)
Chapter 95 : Collapse Prediction (Floor 6)
Chapter 96 : Terrain Advantage (Floor 6)
Chapter 97 : Communication Interception (Floor 6)
Chapter 98 : Valeria’s Surveillance (Floor 6)
Chapter 99: Modified Communication (Floor 6)
Chapter 100 : Guardian Warning Signs (Floor 6)
Chapter 101: Storm-Felled Ancient Guardian (Floor 6)
Chapter 102: Hidden Potential (Floor 6)
Chapter 103: Flowing Environment (Floor 7)
Chapter 104: Water Navigation (Floor 7)
Chapter 105: The Confluence Conundrum (Floor 7)
Chapter 106: Hydroengineering (Floor 7)
Chapter 107 (Floor 7): Aquatic Ecosystem
Chapter 108: Forest Watch Outpost (Floor 7)
Chapter 109 : Group Combat Tactics (Floor 7)
Chapter 110 Valeria’s Communications (Floor 7):
Chapter 111: Communication Confrontation (Floor 7)
Chapter 112 : River Leviathan Guardian (Floor 7)
Chapter 113 : Team Assessment(Floor 7)
Chapter 114 : Interface Modification(Floor 7)
Chapter 115: Living Architecture (Floor 8)
Chapter 116 : Organic Structures(Floor 8)
Chapter 117: The Social Labyrinth (Floor 8)
Chapter 118: Information Gathering (Floor 8)
Chapter 119 : Trading Systems (Floor 8)
Chapter 120 : Quest Networks (Floor 8)
Chapter 121: Valeria’s Betrayal (Floor 8)
Chapter 122 (Floor 8): Corporate Directives
Chapter 123 : Valeria Exposed (Floor 8)
Chapter 124 : Team Loyalty (Floor 8)
Chapter 125: Village Elder Signs (Floor 8)
Chapter 126 : Guardian Deception(Floor 8)
Chapter 127: Village Elder Guardian (Floor 8)
Chapter 128: Predator Environment (Floor 9)
Chapter 129 : Advanced Tracking (Floor 9)
Chapter 130: The Predator’s Maze (Floor 9)
Chapter 131 Ambush Tactics (Floor 9):
Chapter 132: Counter-Ambush Defense (Floor 9)
Chapter 133: Direct Message (Floor 9)
Chapter 134 : Alpha Predator Signs (Floor 9)
Chapter 135 : Alpha Predator Guardian (Floor 9)
Chapter 136 : Heart Tree Discovery (Floor 10)
Chapter 137 : The Heart of the Green (Floor 10)
Chapter 138: Time-Growth Puzzles (Floor 10)
Chapter 139: The Grand Bazaar (Floor 10)
Chapter 140 : Guardian Intelligence (Floor 10)
Chapter 141 : Advanced Preparation (Floor 10)
Chapter 142 : First Realm Guardian (Floor 10)
Chapter 143 : Seasonal Phases (Floor 10)
Chapter 144 : Final Victory on Green Realm (Floor 10)
Chapter 145: Realm Transition (Floor 10)
Chapter 146 : Amber Realm (Floor 11)
Chapter 147 : Heat Management (Floor 11)
Chapter 148 : The Mirage Labyrinth(Floor 11)
Chapter 149 : Optical Illusion Navigation (Floor 11)
Chapter 150: Water Scarcity (Floor 11)
Chapter 151 : Desert Fauna (Floor 11)
Chapter 152 : Sand Predators (Floor 11)
Chapter 153 : Heat-Based Combat (Floor 11)
Chapter 154 : Dune Titan Signs fluid (Floor 11)
Chapter 155 (Floor 11): Dune Titan Guardian
Chapter 156 (Floor 12): Oasis Discovery
Chapter 157 (Floor 12): Water Competition
Chapter 158 (Floor 12): The Gilded Waters
Chapter 159 (Floor 12): Hydration Systems
Chapter 160 (Floor 12): Dune Settlement
Chapter 161 (Floor 12): Resource Trade
Chapter 162 (Floor 12): Golden Pollen Effects
Chapter 163 (Floor 12): Marcus’s Directive
Chapter 164 (Floor 12): Oasis Guardian Signs
Chapter 165 (Floor 12): Oasis Guardian Battle
Chapter 166 (Floor 12): Alexander’s Choice
Chapter 167 (Floor 13): Ancient Excavation
Chapter 168 (Floor 13): Mining Mechanics
Chapter 169 (Floor 13): The Preservation Maze
Chapter 170 (Floor 13): Chronological Puzzles
Chapter 171 (Floor 13): Insectoid Defenders
Chapter 172 (Floor 13): Temporal Anomalies
Chapter 173 (Floor 13): The Personal Library
Chapter 174 (Floor 13): Ancient Knowledge
Chapter 175 (Floor 13): Knowledge Application
Chapter 176 (Floor 13): Amber Golem Signs
Chapter 177 (Floor 13): Amber Golem Guardian
Chapter 178 (Floor 14): Sound-Sensitive Environment
Chapter 179 (Floor 14): Sound Management
Chapter 180 (Floor 14): The Resonance Ravines
Chapter 181 (Floor 14): Harmonic Puzzles
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