Assassin's Creed: Syndicate downloadable content refers to content released separately from Assassin's Creed: Syndicate and implemented into the game at a later date. The following is a list of all additional content available for the game.
- The Dreadful Crimes (PS4 and PC exclusive, not part of season pass)
- Steampunk Pack
- Victorian Legends Pack
- Streets of London Pack
Helix Credits can be used to gain additional in-game currency, crafting resources and other time savers.
- Helix Credit Base Pack - contain 500 Helix Credits.
- Helix Credit Small Pack - contain 1200 Helix Credits.
- Helix Credit Medium Pack - contain 3000 Helix Credits.
- Helix Credit Large Pack - contain 4800 Helix Credits.
- Helix Credit Extra Large Pack - contain 9000 Helix Credits.
The following content can be partially unlocked via certain special editions of Assassin's Creed: Syndicate, Uplay and external merchandise such as Collector's Edition guide promo codes or by downloading Streets of London Pack.
- Suave outfit - for Jacob
- Nighthawk outfit - for Evie
- Iron Belt
- Suave Belt
- Out Of The Blue Cloak
- Crimson Wing Cloak
- Ocean Cane-Sword
- Copper Hammer Cane-Sword
- Dirty Knuckles
- Angel's Knuckles
- Pirate Knuckles
- Ceremonial Kukri
- Golden Kukri
- Ram's Kukri
- Demonic Revolver
- Stealth Revolver
- Redback Gauntlet
- Industrial Gauntlet
- Royal Gauntlet
Assassin’s Creed: Syndicate got some free bonuses following its release.
- Dr. Daniel's Garment's outfit - for Evie
- “Add an extra option to your arsenal with this new outfit for Evie and make the atmosphere a bit more electric.”
- ——Store description
- The Creature's Rags outfit - for Jacob
- “This new outfit for Jacob will bring out the monster in him.”
- ——Store description
- 400 Helix Credits (FREE)
- Initiate Reward Pack (FREE) - Unlock the Ezio Outfit for Jacob and permanently increases in-game currency earned by 10%.
- Assassin Reward Pack (FREE, require at least 2500XP earned in Assassin's Creed games) - Unlock the Élise and the Aveline Outfit for Evie.
- Master Assassin Reward Pack (FREE, require at least 7200XP earned in Assassin's Creed games) - Unlock the Edward Outfit for Jacob and the Shao Jun Outfit for Evie.
- Ubisoft Blue equipment colors (10U)
- Teal equipment colors (10U)
- Evie and Jacob Cloak/Belt Combo (15U)
- Bullseye Revolver (20U)
- Arbaaz Mir's cane-sword (20U)
- The Baker Street outfit (30U)
A Season Pass is also available for the game, which granted exclusive access to A Long Night Out on the Town mission, permanent XP boost (10%) and 500 Helix Credits. Accompanying this, at $29.99, the pass is 25% cheaper than buying all downloadable content packs separately. The season pass does not grant access to the The Dreadful Crimes DLC.