After 10 years, Destiny is getting a game mode that fans wanted from the start

pcgamer.com:

Of all the odd decisions Bungie has made over the course of Destiny's existence, one of the oddest has to be the reluctance to add a true horde mode. Sure, we've had quasi-horde seasonal activities like Escalation Protocol and The Menagerie, but never a proper hunker-down-and-defend deal. That changes on April 9 with the release of the free Into the Light update, which includes the new Onslaught mode that pits teams of three players against up to 50 waves of enemies, escalating in difficulty. 

Revealed today during the first of three livestreams leading up to the release of Into the Light, Onslaught sees the guardians defending the Last City from the invading forces of The Witness (specifically: Fallen and Hive). In practical terms, that means being dropped into a Crucible map—for the demo they used Midtown—in order to defend a macguffin called the Advanced Defence Unit (ADU).

The quest giver and hype man for the Onslaught is Lord Shaxx, who also serves as the voice of The Crucible. You'll be supported on ground by his robot Redjacks and also be able to purchase upgradeable defence items.

The three types of defence are a turret (of course), a decoy (in the form of a sweeperbot), and a laser-activated tripmine. Each can be upgraded three times, adding health, damage, and so on. However, if your level three turret gets destroyed, you'll have to buy a brand new lvl 1 version. Likewise, tripmines are one-and-done, so need to be replaced between waves. The currency you spend in Onslaught's shop is called 'Scrap', and its acquisition is shared across the team and then split equally during the spending phase.

There are two main versions of Onslaught available. The Onslaught Playlist variant features matchmaking and only includes 10 waves. After the first two waves, a 'Darkness zone' comes into effect, meaning if all players are dead then the run is over. Make it past the final wave and you'll receive double loot the loot. I suspect what will be more appealing to Destiny