DREDGE: story with some extras about 12 hours; 100% completion about 24 hours. These are IGDB player-submitted averages from 5 submissions, not a deadline or a prediction of your pace.
Source: IGDB player submissions
Community playtime data is not available for DREDGE yet. Tracked platforms include Steam.
Game Tales keeps what happened between you and a game in one Tale you can keep building.