Serious Sam: Siberian Mayhem got a new update yesterday, and it’s called the Halloween Spooky Update 1.05.
The last time Serious Sam: Siberian Mayhem got an update, was on August 2, and it was only some bugfixes.
Now with the new 1.05 update, you actually get some new content AND bugfixes.
But you have to be fast, as it’s timed Halloween content. You have time from October 25 0 UTC until November 4 23:59 UTC. And if you miss it, you will have to wait a whole year until next Halloween.
Click here to read the whole post on Steam from the developers themselves.