Steam now offers the new Trauma DLC for Alien: Isolation, the survival/horror game which currently happens to be on sale for half off. Here's what the new pack adds:

Welcome to Trauma, the second add-on content pack for Alien: Isolation. This pack features three all-new maps for Survivor Mode, a time-based challenge to test your skills.

Face off against a range of enemies across the medical bays of Sevastopol station. Will you evade, distract or confront them? You'll have to act fast if you want to survive.

• Three new maps, including a claustrophobic scramble through the Sevastopol vents.
• Play as Chief Medical Officer Lingard and get faster access to Medikits and distraction IEDs.
• Destroy any trace of your research and save the survivors on the station.