The game uses a first-person text-adventure perspective. The player reads descriptions of rooms and events, then types commands such as movement, examination, conversation, and object manipulation. The objective is to investigate the threat to Hydrodam and determine how to respond before the situation becomes critical.

Progression comes from exploring connected locations, collecting information, understanding the behavior of important devices and characters, and solving environmental puzzles. There is a limited story structure rather than a selection of separate modes, and success depends on interpreting the prose and trying appropriate actions.

Map the underwater facility as you explore, and record notable objects, messages, and changes in the environment. Examine unfamiliar items and revisit locations after major discoveries.

Use precise commands and consider alternate verbs when the parser rejects an action. Save frequently before experiments or dangerous scenes, because some situations can become difficult to recover from.