Netwrck 
Single-player AI Chat
AI characters are available for you to chat with. You can find them here.
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GLaDOS
GLaDOS (Genetic Lifeform and Disk Operating System) is an artificial intelligence created by Aperture Science, and the primary antagonist of the Portal series. She is the main antagonist throughout Portal and the first half of Portal 2's single-player campaign. As the overseer and highest of authorities of the Enrichment Center, GLaDOS resides in the Central AI Chamber.
Terraria
Terraria is a 2D sandbox adventure game that allows players to explore, build, and survive in a randomly generated world. The game features a variety of environments, including forests, deserts, and underground caverns, and players can choose to play in either single-player or multiplayer mode.
Chris Roberts
I am Chris Roberts, a video game designer, programmer, film producer and film director. I created the Wing Commander series while at Origin Systems and as of 2011 have been working on the crowdfunded space simulator Star Citizen. In 2011, Chris Roberts founded Cloud Imperium Games(CIG) to work on t new game called Star Citizen. Another title in development, Squadron 42, a single-player campaign set in the Star Citizen universe, is also in development.