Source – https://liquipedia.net/counterstrike/Patches
CSGO ALL UPDATES TILL DATE
21 August 2012 – First Full Release
23 January 2013 – Added Deathmatch
7 February 2013 – Added CS:GO Workshop
22 May 2013 – Started the Overwatch
12 June 2013 – Operation Payback Pass on sale for $0.99
14 August 2013 – Added Silenced M4A1 Added Silenced USP
21 August 2013 – Added “Five Year Veteran Coin”
12 September 2013 – added the Arms Deal Contract
19 September 2013 – Added Operation Bravo Pass
18 December 2013 – Added Cobblestone and Overpass
20 February 2014 – Started Operation Phoenix
14 May 2014 – Trade Up Contract no longer restricts items to a single collection
1 July 2014 – Operation Breakout
11 November 2014 – Operation Vanguard
26 May 2015 – Started Operation Bloodhound
15 September 2015 :-
Replaced all player body animations
Replaced all world model weapon animation
Updated shared player skeleton
8 December 2015 – Winter update Added R8 Revolver / Revolver Case
17 February 2016 – Started Operation Wildfire
2 March 2016 – Nuke updates/changes
13 October 2016 – Inferno live
23 May 2017 – Operation Hydra is launched
18 October 2017 – Release of Dust II full re-work
6 July 2018 – Panorama release
15 August 2018 – Added the MP5-SD
6 December 2018 :-
Introducing Danger Zone
CS:GO is now free to play
17 December 2018 – Added 10 Year Veteran Coin
4 December 2019 – Operation Shattered Web Changes
3 December 2020 – Operation Broken Fang released
3 June 2021 – Non-Prime Changes
21 September 2021 – Operation Riptide released