See the full list over 80 optimizations and or minor bug fixes for some crashes, ect
http://forums.seriouszone.com/showthread.php?t=62433


- Fixed bug which caused falling damage when player would climb down the ladder.

- Player can now exit the ladder after climbing down to its base, even if there is no floor below.

- Several optimizations in network processing, which lower the CPU load on server and make better use of available bandwidth for clients.

- Added steam_bEnableVAC cvar for starting a dedicated server with VAC support. VAC is now enabled by default.

- Added a checkbox for filtering VAC unsecured servers in the server list.

- Server list now shows an icon for VAC protected servers.

- Using third person view mode is no longer reported as cheating in versus game modes.

- Players will no longer produce wound sounds and effects if damaged while dead.

- A sound is now played when extra life is received.

- Weapons that don't need auto-aiming no longer show the indicator.

- Pressing "aim" button when auto-aiming is enabled will lock on target even for weapons that don't have aim-down-sight.

- Auto-aim target tracking during aiming is now more robust handling cases such as spiders on ceilings.

‎Devolver Digital and Croteam are proud to announce the Legend of the Beast DLC pack for Serious Sam HD: The Second Encounter (PC).

Three new campaign missions, three new survival maps, and three new versus maps all coming on May 15th!

In addition to the new content, Croteam and Devolver Digital will be making all Serious Sam HD: The Second Encounter’s versus and survivor multiplayer modes free-to-play via Steam and available to download at no charge permanently starting May 15th. These free modes include Capture the Flag, Deathmatch, Team Deathmatch, Instant Kill, Last Man Standing, My Burden, Survival and Team Survival.

http://www.devolverdigital.com/post/22657836466

Serious Sam 3: BFE is now available on Mac via Steam and Get Games! Download it this week on either PC or Mac and get 66% off!

http://store.steampowered.com/app/41070/

Like -> http://www.facebook.com/pages/Devolver-Digital/147710281999140

Devolver Digital:
if we're ever going to be a video game powerhouse of awesome. If you help us get a ton of new followers then we'll start dealing out Serious Sam Complete Pack codes on our wall as a thank you for your hard work and compliance.

That's a chance at $100 worth of Serious Sam for doing nothing more than bothering your friends and making them love us through the internet.

Get on it!

Serious Sam: The Random Encounter by Vlambeer is included in Steam's limited-time From Holland with Love pack. Grab it now and get some great Dutch gaming goodness!

http://store.steampowered.com/sub/14092