Via [url=http://blog.counter-strike.net/index.php/2018/11/21456/]the CS:GO blog[/url]:

[quote=Valve][HOLIDAY]
– Halloween has come to a close. Thanks for celebrating with us!

[SCOREBOARD]
– Added clinch marker to the timeline. The timeline will now show the earliest round at which the match can end, and which team can win the match on it.
– Scoreboard player stats now support any number of rounds. Player stats will no longer reset every overtime.
– Added more stats to Demolition and Flying Scoutsman.

[MAPS]
Biome and Subzero have been added to Competitive Matchmaking!

Cbble:
-Removed Halloween decorations
-Removed cover in corridor leading to B plat
-Added lore to A site bombtarget
-Opened up windows from B halls towards site
-Re-enabled boost on B site
-Lowered cover in headshot position in Long A
-Reduced amount of coffins
-Increased amount of wood barrels
– De-spookified cbble loading screen
– Exorcised and dusted the cbble radar[/quote]

Rumor has it:

- [url=https://github.com/SteamDatabase/GameTracking-CSGO/commit/164a03c3409faef2948bc5e8881f63ee6e14b035#diff-2376c954aec3534dcd1d16ff16959553R21109]Reasons for a player's disconnection are now going to be a lot more clearer[/url] in many cases, such as when players were kicked for excessive teamkilling ("For killing too many teammates"), for knifing someone right at the start of a round ("For killing a teammate at round start"), AFK ("Player idle"), for jumping off on Vertigo ("For suiciding too many times"), and more

- Cobblestone's spoopy scary thumbnail [url=https://github.com/SteamDatabase/GameTracking-CSGO/commit/164a03c3409faef2948bc5e8881f63ee6e14b035?short_path=307f615#diff-307f615c4d3cad62599396dc96072c4f]is no more as well[/url]

- For the console enthusiasts, /u/FuneralChris has [url=https://www.reddit.com/r/GlobalOffensive/comments/9uk2qp/counterstrike_global_offensive_update_for_11518/e94viz8/]today's command updates[/url], including a revert of the last update altering dsp_room from a float to an integer back to a float

- Size is ~40 MB