If you watched the ten minute-long dose of BioShock Infinite gameplay, you might have wondered how the rollercoaster-in-the-sky action sequences were going to work, what those tracks were for and how BioShock creative director Ken Levine might describe them.

Wonder no more! Those motion sickness inspiring moments are fully playable and seemingly a key component of BioShock Infinite’s gameplay. “Imagine being on a roller coaster, over another roller coaster, over another roller coaster,” Levine tells the official PlayStation blog. “Imagine being able to jump freely from one roller coaster to the next. Then imagine people are shooting at you. And you’re [...]