This is a fascinating game that has been released by GlassLab. The premise is to have an interactive online game that is based on the ability to critically reason, present positions in a debate, and work and collaborate with others to maintain a base on Mars. While this is designed for upper middle school students in the US, this would be a great debate game for teachers working with students in the B1+ to B2 (low to intermediate ESL/EFL learners) who want to improve their ability in conversations where reason and logic are presented.
Also it is presented at every educators favorite price.
Check it out here: