This is Trey Parker creator of South Park - this is his favourite board game of all time. A simple co-op game of climbing a mountain but contains many disasters and tribulations that will give you some of the greatest gaming experiences of all time. Only selling because the base game came with the recent kickstarter release and I already had a copy (I just wanted the expansions and the big box). This copy has not been played, only opened to check contents. Sheets have been unpunched and the cards are still sealed. 

This is an excellent co-op game that also contains a competitive mode. Plays up to 1-6 players. Highly recommend to any board game group, one of my personal favourites.