What are some alternatives?
When comparing Terasology and RSA, you can also consider the following products
Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Microsoft Cybersecurity Protection - Our security operates at a global scale, analyzing 6.5 trillion signals a day to make our platform more adaptive, intelligent, and responsive to emerging threats.
Voxelands - The Fun-Focused Free Software Voxel World Game.
OneNeck IT Solutions - OneNeck provides a comprehensive suite of enterprise-class IT solutions that are customized to fit your specific needs.
Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
McAfee Security Services - With a global professional services organization, McAfee provides security consulting, security education, and product and solution deployment services to customers around the world.