4 player co-op unveil trailer
Also gonna be on sale with a 75% discount later today on Steam. BUY IT.
Here's hoping they add a fourpack for the occasion.
full patch notes:
Updates to Sanctum have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:
Sanctum
Added support for 4 players in co-op!
Added Endless Singleplayer mode!
Added Limited amount of waves in multiplayer!
Added Turbo Mode!
Added more Achievements!
Added co-op build and upgrade towers!
Added Ping in Server Browser
Added option for server to kick players
Added option to see full games in Server Browser
New and improved HUD arrows!
Improved GamePad support!
You can now "Ping" by right clicking in the overview!
On top of this, a huge amount of general bug fixes, performance optimization and balance changes has been made.