Earth has seen much better days, and science says it's largely humanity's fault. This week, the antarctic ice sheet's eventual collapse was declared "unstoppable" by research teams. How might we survive unprecedented rises in sea level? No one's sure, but games like BioShock and Brink may have the right idea.
By the time it really hits you that flash-based tower defense game Rizk is actually teaching you about climate change, you might be enjoying yourself too much to care.