Siltbreaker/Act I

Zones

 * Players must progress through separate zones to complete the campaign.
 * Each zone has three difficulty tiers, represented by three stars.
 * A star ranking is given out at the end of each zone depending on certain criteria met.
 * Players can pass through a zone without earning any stars.
 * Click on a zone's name for full information regarding units, objects, drop rates and more.

Respawning

 * Players obtain one respawn charge every time a checkpoint is passed, up to 5 charges.
 * Players can respawn one another by clicking on a fallen player's tombstone. This will consume a respawn charge.
 * Players can buy back, and respawn at the last checkpoint. This will consume two respawn charges.
 * A Life Rune can be picked up to gain an additional respawn charge.

Heroes

 * A limited selection of heroes are available for this campaign.
 * Some heroes have altered abilities made specifically for this event.
 * Click on a hero's icon to see their custom stats and abilities for this event.

Items

 * Siltbreaker uses the default Dota 2 items, with a few tweaks. A couple of items are completely disabled, while a very few received modifications. Four new consumable items, three new tomes, 17 new permanent items (refered to as "Artifacts") and one quest item are added as drop-only items, and one special item is added as a purchasable gamble item.
 * Most buyable items can be found as drop-items after killing enemies or breaking environmental objects and opening chests.
 * They can also be purchased at various shops scattered across the campaign. Most items can be sold at shops.
 * Dropped items last for 30 seconds on the ground before they despawn. This excludes quest items, Life Runes and Artifacts.
 * Items are fully sharable with allies (including NPCs).

New items
These items cannot be purchased, but are dropped from enemies, except for the quest item.

Secretive Shopkeeper

 * Two Secretive Shopkeepers are hidden across the map.
 * They sell for 750 gold, which contain a random item, a trap, or an artifact.

Unavailable Items
The following items cannot be purchased, built or found in this game mode:

Modified Items
All items are fully sharable with allies. Besides this, the following items have been further modified:

Artifacts

 * Artifacts can be used to provide various benefits in the campaign.
 * Artifacts are obtained in the armory as a cosmetic item by random drop in game. These items can then be equipped in-game via the artifacts tab next to the shop tab.
 * Owned Artifacts have to be bought with Artifact coins in-game. Artifact coins are acquired as random drops from enemies.
 * Artifacts appear as golden treasure boxes when dropped on the ground.
 * Artifacts are assigned and bound to a player upon dropping, and cannot be shared.
 * Artifacts are permanent and can be used across multiple games.
 * Artifacts from Act I can be used in Act II, and vice versa.
 * Players must be above a certain level for artifacts to function.
 * Click on an artifact's name to see more detailed mechanics and information.

Zones

 * Players with Battle Pass level 165 or higher will receive two Siltbreaker Rewards for every zone they complete with 3 stars.
 * Claiming the Level 165 Bonus Siltbreaker Treasures reward will retroactively grant bonus treasures for any zones that had been previously 3 starred.

Completion

 * Like normal matches, players can receive drops after each game.
 * Players who complete the campaign will earn a special emoticon.