* A Zoo level features "spliced" animals, such as a rhinoceros.
* Spliced dogs and robots can be hacked to help players.
* At some point, Soviets invade Rapture, looking for the lucrative Adam energy. The Soviets are "much smarter" than other enemies, and will use plasmids.
* New plasmids include telepathy and the ability to slow time. By reading minds, players can discover keypad combination and enemy weaknesses.
* There will be challenge rooms, as well as a new health and revival system.