One of the hardest part of the game is the canon blasters that you must control manually; blasting asteroids and preserving ship integrity until the autopilot comes online. Also, a strong new enemy type that must be blasted from behind is seriously bad ass. I also discovered a new weapon that I like very much (has to be close range) is the force gun. Good for over limb destruction.
https://rumble.com/v1tmmbu-dead-space-playthrough-chapter-4-obliteration-imminent.html