From the campaign:
Antidote: Lab Alliance, expansion to the deduction card game Antidote launched on Kickstarter. The expansion offers five new ways to play Antidote including support for up to 9 players, team play, new turn actions and special cards, and sinister new Lab Romance characters.
A pledge of $9 plus shipping will get backers a copy of the expansion.
The Kickstarter campaign is around 3x funded with still 11 days to go.