Descent to Undermountain

You are a novice adventurer fallen upon hard times. With little but your fighting skills to carry you through the Realms, you have chanced upon a rumor that Khelben Blackstaff, the high mage of Waterdeep, is seeking ablebodied adventurers to undertake a task for him…and will pay well for their services. With no other opportunities before you, you have chosen to travel to the city of Waterdeep and answer Khelben’s summons.
You have a suspicion that Khelben’s call concerns Undermountain, the great dungeon located beneath the streets of Waterdeep. Constructed by the mad wizard Halaster over a millennia ago as a sanctuary, (and a sadistic playground of sorts) its depths have always been a source of unease for the citizens of Waterdeep. No one can say for sure if Halaster still lives in the labyrinth dungeon, but many brave souls have entered Undermountain searching for what remains of the mad wizard’s fortunes and magic. The end result is that Undermountain has become one of the largest graveyards in the Realms for all who are obsessed with adventure, wealth, or power.
You intend to seek out Blackstaff’s tower and make yourself known to the wizard when you enter the city. Hopefully, the task (and the payment it carries) will still be available when you arrive. If his summons concerns Undermountain, then the risk will be great... but so too, shall the reward.

What is abandonware ?