NKC Multi-Agent Models provides researchers and developers with a comprehensive toolkit for designing, training, and evaluating multi-agent reinforcement learning systems. It features a modular architecture where users define custom agent policies, environment dynamics, and reward structures. Seamless integration with OpenAI Gym allows for rapid prototyping, while support for TensorFlow and PyTorch enables flexibility in selecting learning backends. The framework includes utilities for experience replay, centralized training with decentralized execution, and distributed training across multiple GPUs. Extensive logging and visualization modules capture performance metrics, facilitating benchmarking and hyperparameter tuning. By simplifying the setup of cooperative, competitive, and mixed-motive scenarios, NKC Multi-Agent Models accelerates experimentation in domains such as autonomous vehicles, robotic swarms, and game AI.