Kickstarter https://www.kickstarter.com/projects/iello/zombie-15
English - Zombie 15' was funded on the Crowdfunding Kickstarter (See the campaign) platform on the Feb 13, 2014, the campaign lasted 30 days. 1,980 people helped funded the game, whose the amount requested was $35,000.00. Thanks to these 1,980 people the game could be funded up to $141,203.00, ~403.44%.
Boardgamegeek https://boardgamegeek.com/boardgameexpansion/163378/zombie-15-left-alone-solo-campaign
English - Zombie 15': Left Alone – Solo Campaign consists of fifteen Zombie 15' scenarios for a single player, with the scenarios being linked and growing progressively more difficult.
Ludovox http://ludovox.fr/jeu-de-societe/zombie-15-left-alone/
French - Une campagne solo épique pour Zombie 15' !
Official http://www.zombie15.com
French - Essayez-vous aux 15 minutes de jeu frénétiques et incarnez un groupe de 2 à 4 adolescents luttant pour survivre tout en essayant de découvrir ce qui se cache derrière l'épidémie qui a brutalement transformé leurs parents.