There's a new patch available for Serious Sam 2, version 2.068. This patch adds deathmatch multiplayer, YEAH!! The following snippet from the changelog made me grin, 'In DM, player runs faster when using the chainsaw.'. Perhaps I'm just a maniac in disguise.

You can grab the retail 43.8mb patch from the 2KGames website and both retail and 40.9mb digital distribution version from 3dGamers.

Full Changelog;

* Implemented Deathmatch game mode
* It is now possible to execute a script file from the console (exec script.cfg)
* Added samListPlayers() console command - displays the list of all players in the 'playerindex playername' format.
* Implemented banning of players by IP address (permanent or temporary).
* Implemented map list and map rotation - map list can be specified either in a cvar or through a file.
* Added falling damage.
* Added damage impact - knockback from explosions.
* Increased player speed for deathmatch games (12.5 m/s).
* In DM, player runs faster when using the chainsaw.
* Players dop the current weapon when killed (DM only).
* It is now posible to disable items, weapons and powerups.
* Player can be gibbed (DM only).
* Implemented the in-game voting system (votes for next map, map restart, kicking players, temporary player ban).
* Added the 'only if stronger' option to auto weapon change setting.
* Chat message sound is much louder now.
* Added support for multi-core in physics solver (disabled by default).