Shellshock

Shellshock is a short anomaly-hunting experience set in an endlessly looping World War I trench. You play as a British soldier trying to escape by reaching the final trench. Inspect each stretch for changes, then choose the left door if you have spotted an anomaly or the right door if there is nothing to report. The experience takes around 10–30 minutes, depending on difficulty.

Search the trenches

The first trench has no anomaly. In each trench after that, look for changes before choosing a door. Some are easy to spot and others are harder, and a loop may contain no change at all. The differences are randomised, so take your time and pay attention.

A correct choice advances you to the next loop. If you miss a change or report one when there is none, you return to trench 0 and start again. The game has 60 anomalies, which do not repeat during normal play until you reach the end of the anomaly list or start a new game. After you reach the end of the list, only anomalies you missed appear again until you identify them all. Once you identify or miss an anomaly, it is marked at the end of the trench; more detailed information is available in the pause menu and during the end cutscene.

Game modes

The selected mode determines which trench number you need to reach to escape:

• Reach Trench 20: Reach trench 20 and escape. Your anomaly progress is saved at the end of each trench. After completing the mode, you can continue playing Reach Trench 20 to find all 60 anomalies, including those tied to achievements.
• Find them all: Keep running the trench until you find all 60 anomalies. Progress is saved at the end of each trench, so you can return to this mode later.

Continue resumes your saved progress in the current mode. New Game resets your anomaly history and starts a game in the selected mode; changing modes also resets your anomaly history and starts a game in the new mode.