Cataclysm: Dark Days Ahead
Cataclysm: Dark Days Ahead is an open-source post-apocalyptic survival roguelike that emphasizes detailed simulation systems and complex crafting mechanics.
Crafting and Production Systems
The game features over 15,000 craftable items ranging from basic tools to advanced electronics and chemical compounds. Recipe requirements include authentic materials, tools, and skill prerequisites. The production system includes multi-stage manufacturing processes with quality systems affecting item performance. Resource availability changes with seasonal and environmental conditions.
Vehicle Construction
Players can construct modular vehicles from bicycles to large mobile bases using component-based engineering. The system includes engines, wheels, armor, and electronics with realistic physics simulation. Multiple fuel types exist with specific consumption rates and engine compatibility. Vehicles can be completely customized for size, shape, and functionality, with detailed collision and damage modeling.
World and Setting
The game features a rich backstory explaining the zombie apocalypse and ongoing mutations. Multiple survivor factions exist with distinct goals, technologies, and territories. Dynamic world events create ongoing changes in the gameplay environment. The mutation system allows character evolution through genetic modification, while environmental hazards include radiation, toxic waste, extreme weather, and evolving threats.
Development Model
The project operates as open source with thousands of contributors using GitHub for development workflow with issue tracking and code review. The game receives weekly updates with new content, fixes, and system improvements. The community focuses on accessibility and maintains comprehensive documentation and guides.
Survival Systems
The game simulates biological needs including hunger, thirst, sleep, pain, and disease. The clothing system features layered clothing with temperature regulation, protection, and encumbrance effects. Hundreds of skills improve through practical use and study. Combat includes an anatomical damage system with bleeding, broken bones, and infection. Mental health is modeled through morale, depression, and psychological effects.
Base Building and Settlement
Players can construct anything from simple shelters to multi-story complexes. The resource management system covers gathering, processing, and storage for long-term survival. NPCs can be recruited to build communities with specialized roles. Fortification options protect against zombie hordes and human threats. Power generation includes solar panels, generators, and electrical systems.
Technical Features
Built with C++, the game provides high-performance simulation across Windows, Linux, macOS, Android, and iOS. The save system preserves large amounts of world state and character data. JSON-based modding systems enable easy content modification while maintaining smooth gameplay despite simulating thousands of entities.
Content and Features
The game includes laboratory exploration with scientific facilities, underground systems like subway tunnels and bunkers, seasonal gameplay with weather effects, character backgrounds affecting initial skills and equipment, and advanced end-game challenges for long-term character development.