Price remains the same: 800 MSP (£6.80/€9.60) or $9.99. The Rapture Metro Pack had been due out on 29th April but was held back at the last moment.
Inside are six new multiplayer maps, three new masks, three new Achievements and a melee deathmatch mode.
Also available today is the BioShock 2 Character Pack. In this are Zigo the Fisherman and Blanche the Actress. The two characters cost 160 MSP (£1.40/€1.90) or $1.99.
There's no sign of the content yet. The Cult of Rapture website also promises it's coming "soon" on PC.