BioShock (2007)

Rapture rewards the kind of attention a free weekend permits. Explore its ruined rooms, listen to the people who shaped it and experiment with weapons and bodily powers while the city's ideas come into focus. About 12 to 15 hours suits a first story playthrough with some looking around. This is the 2007 original adventure, also available in remastered form; take the time to listen rather than rushing between fights.