Starter deck is a stand alone card game that you can play with your friend up to 5 players. But expansion deck is an extension of starter deck that include more 30 action cards and 20 special card (exclusive only expansion deck). More ever expansion deck allow you to have fun with friends rise up to 8 people .
Sample of special card
"The big nuke" -- This is quite a big bomb trap, so the players will lose 3 HPs if they cannot remove out this trap.
"Stay withe me" -- Switch your HPs with another player.
"Read mind" -- Choose one player and get rights to see all his/her cards on hands.