Changelog for Update 1.6 (added 17. December 2019):

New Parts

(Career unlock level is in brackets after a part's name. All parts are available in Free Build instantly.)

Cases
Open Benchtable OBT-BC1 (9)
Silverstone RL08 (10)
Silverstone LD03 (10)
Lian Li TU150 (28)
CORSAIR Carbide Series 175R RGB Tempered Glass Mid-Tower ATX (21)

Case Fans
Mortoni RGB Fan (10)
Lian Li Bora Digital ARGB (15)

PSUs
Cooler Master V850 Gold (25)
Cooler Master MWE 700 Bronze V2 (22)
Cooler Master MWE 750 White V2 (22)
CORSAIR RM Series™ RM850 (21)
CORSAIR RMx Series™ RM650x (21)

Motherboards
GIGABYTE X570 AORUS MASTER (30)
GIGABYTE X570 AORUS XTREME (30)
MSI MEG Z390 ACE (26)
MSI MAG Z390 TOMAHAWK (26)
MSI MPG Z390 GAMING EDGE AC (26)

RAM
GIGABYTE Memory 8GB 2666MHz (14)
Patriot Viper Steel Series DDR4 (26)
ADATA Spectrix D60G (19)

Graphics Cards
GIGABYTE AORUS GeForce® RTX 2080 SUPER™ WATERFORCE WB 8G (29)
GIGABYTE AORUS GeForce® RTX 2080 SUPER™ 8G (28)
GIGABYTE GeForce® RTX 2070 SUPER™ GAMING OC WHITE 8G (28)
ZOTAC GAMING GeForce RTX 2080 Ti ArcticStorm (27)
ZOTAC GAMING GeForce RTX 2080 Ti AMP Extreme (27)
ZOTAC GAMING GeForce GTX 1660 Ti AMP (29)
ASUS ROG Strix GeForce® RTX 2060 SUPER series (28)
ASUS ROG Strix GeForce® RTX 2070 SUPER series (28)
ASUS ROG Strix GeForce® RTX 2080 SUPER series (28)

Storage
GIGABYTE UD PRO SSD (13)
GIGABYTE SSD (13)
GIGABYTE GIGABYTE M.2 PCIe SSD (22)
GIGABYTE AORUS NVMe Gen4 SSD (22)
GIGABYTE AORUS RGB M.2 NVMe SSD (22)
Patriot Viper VPR100 series (M.2 RGB PCIe Gen 3 x4SSD) (17)
Patriot Viper VP4100 series (M.2 PCIe Gen 4 x4 SSD) (17)
Patriot Viper VPN100 series (M.2 PCIe Gen 3 x4 SSD) (17)
ADATA Spectrix S40G RGB M.2 SSD (18)
CORSAIR MP600 Force Series Gen.4 PCIe MP600 NVMe M.2 SSD (20)

Liquid Cooler
SilverStone PF360-ARGB (25)
SilverStone PF240-ARGB (25)
SilverStone PF120-ARGB (25)

CPU
AMD Ryzen™ 9 3950X (30)

Mousemat
ADATA XPG Battleground XL Prime (20)

Monitor
ASUS ROG Swift PG279QE (26)

Keyboard
ADATA XPG Summoner (20)

Headset
ADATA XPG Precog (20)

SLI Bridges
ZOTAC GAMING NVLink Bridge (4 slot)
ZOTAC GAMING NVLink Bridge (3 slot)
ROG SLI Bridges

Fixes

• Fixed – errors from the radio plugin if you play the game while being offline (not connected to the internet).
• Fixed – Razer Chroma functionality not working as expected.
• Fixed – Cases always appear as "used" in inventory.
• Fixed – Rare but game-breaking bug when turning off a PC.
• Fixed – Workshop selection screen - back button not functional at 1024 x 768 resolution.
• Fixed – Incorrect ranking of some CPUs in Parts Ranking

Updates of standalone installers and DLC's (1.5.2 ⇒ 1.6), on 18 December 2019.

Can't PM you to let you know that the Changelog thread's here. Could you, please, post in it, linking to this post of yours, and use that thread in the future as to keep all changelogs in one place? Cheers.