DOTA 2 Large update with 2gb file size

                                            "Large Update"

Image source: DOTA 2 wiki

                              One of the largest update but unfortunately no new hero included at this time. 

Dota 2 Patch Notes (1/31/2013):

NOTE: This update has reorganized the file layout of Dota 2 to speed up loading and for future localization support. This will result in a large update and may take a while to download.

GAMEPLAY

•  Fixed how magic damage is amplified when there are multiple sources of bonuses.
• Death Prophet: Fixed Exorcism healing never resetting.
• Enigma: Tightened selection area of Eidolons to make picking individual units easier when they clump
• Gyrocopter: Fixed Call Down not slowing magic immune units.
• Spectre: Spectral Dagger now properly trails invisible units.
• Spectre: Fixed various properties of Haunt illusions being incorrect.
• Tiny: Fixed Craggy Exterior working on illusions of Tiny.
• Visage: Fixed Roshan decreasing Gravekeeper’s Cloak charges.
• Visage: Fixed Gravekeeper’s Cloak not restoring its layers independently of one another.
• Warlock: Fixed Flaming Fist damage not leveling properly, damaging magic immune units, and having incorrect chance to proc.
• Fixed a bug with Radiance kill credit and illusions.
• Fixed Roshan no longer casting Slam to slow and damage nearby units.

UI

• The Smooth Drag option now works for anyone that’s spectating (whether through DotaTV or as a broadcaster).
• Reduced waiting time in hero picker during All Random to 10 seconds.
• Reworked how your personal hero performance is done on your profile page
• Added preview for summoned items like the panda and watcher golem to store and backpack.
• Added the ability to filter out empty teams from the team list.

BOTS

• Fixed some incorrect timing calculations that were causing bots to miss some last hits.
• Fixed Practice vs Bots not properly selecting the nearest server.
• Fixed Death Prophet bot to know about the true range of Crypt Swarm.
• Fixed bots thrashing selling a situational item (dust, wards, TP scroll) to purchase another situational item.

WEBAPI

• Added Captain’s Mode Picks and Bans.
• Added ability upgrade order and times to each player.
• Added inventory for additional units (Lone Druid’s Spirit Bear).
• Added an API for getting match details in the order they were recorded.

via Steam.com