Here are all the maps included with this release of Sven Co-op. To play them load the BSP name. The map will progress onto additional maps in its own way if it has them.
Some of the older maps from the previous release were removed from the official map list to make room for new material. These maps can still be played by downloading an additional file "Classic Map Pack", which you can find on the Sven Co-op files page.
To play the Half-Life story, Opposing Force story, or Uplink story on Sven Co-op use the portal map made by Puchi.
To play the They Hunger story on Sven Co-op, load the first map of the series.