de_hidro update 2.7 patch notes:
GAMEPLAY
-blocked off area around B stairs
-changed window textures
-moved bombsite A to the blue container
-switched the crane`s position with the blue container
-widened the catwalk
-changed crate positions on the roof
-added room leading to A
-added 2 man boost at CT spawn
-added to man boost at A room
-added more cover to the inside of the blue container

(Thanks to The Gardai, Guarddyyy, ItzEndo, and Asta for the amazing feedback! And Flint for making a custom prop!)

de_hidro update 2.6 patch notes:
GAMEPLAY
-added diagonal wall to B offices
-added another office
-added radar overview
MISC
-fixed graphical bugs
-clipped off non-solid fence
-fixed gap in the B connector

de_hidro update patch notes 2.5:
GAMEPLAY
-slightly moved B site closer to the wall
-added connector from B offices to B site
-changed door rotations on B
-changed cover on the roof
-changed floor texture
-added number plate to "Volt`s car"
-made window in B offices smaller
-rotated a cubical for cover

de_hidro update 2.4 patch notes:
GAMEPLAY
-Widened CT spawn, narrowing B building
-Moved ladder from inside to roof outside
-Removed orange container
-Added carpark
-Removed ladder from crates to window
-Removed catwalk on the roof
-Made window on B lower smaller

de_hidro update patch notes 2.3:
MISC
-Added some color to the map
-Fixed radar overview

de_hidro update patch notes 2.2:
GAMEPLAY
-Reduced playable area around B halls
-Removed stairs leading to B
-Added secondary entrance to B from CT spawn
-Moved ladder leading to Roof inside
-Made catwalk longer so players can climb on it from the crates leading to Window

de_hidro update patch notes 2.1:
MISC
-Changed skybox texture and lighting
-Added radar overview
-Fixed graffities pointing to either bombsites

de_hidro update patch notes 2.0

GAMEPLAY
-Added catwalk
-Added graffities for navigation
-Removed door leading to B
-Added door leading to B inside
-Added more cover around T spawn

MISC
-Changed sun agles

de_hidro update patch notes 1.9

GAMEPLAY
-Narrowed corridors
-Fixed several invisibility problems
-Added more cover for T`s in B halls
-Added secondary entrance for T`s to B site

(Thanks Astr0 for the suggestions!)

de_hidro update patch notes 1.81

MISC
-Added easter egg