How TESA's Helping Create a New Economy Posted on February 22, 2014 by TESA Collective What makes TESA and Co-opoly different? Want more details? Check out our blog post on creating an ethical supply chain. Support Our Work TESA is proud to lead the development of games, tools, and programs for social change. You can support our work while having fun: buy our games about changing the world. TESA can also work with you to build a game, program, or tool for your cause!