“While players may download the Destiny base game, they will only be granted access to the Destiny Trial Mode for free.
Over the past few days, Destiny players might have noticed the game showing up in online storefronts as free.
If players wish to progress through the original Destiny adventure via digital download, they will be required to purchase Destiny – The Collection to gain access to this content.”
“The original Destiny adventure may appear to be free on some digital console marketplaces.