Purchase the Bonus Pack and receive the following extras (available for PC, Mac and linux) for Serious Sam 3: BFE:

• Original Soundtrack* - Collection of 40 amazing soundtracks, specially composed by Damjan Mravunac and Undercode, spanning the entire Serious Sam 3 experience!
  
• Brett Sanderson Headless Kamikaze - Timed Exclusive Item: Bonus Multiplayer Character! Play as Brett Sanderson Headless Kamikaze, a headless man who decided to volunteer to be a Beheaded Kamikaze, because he wanted a lot more excitement in his life, and nothing is more exciting that running around without a head with bombs in your hands!
  
• Sniper Scope - Timed Exclusive DLC: Bonus In-game Weapon Upgrade! Use sniper scope for the powerful AS-24 "Devastator" Weapon!
  
• Documentary Video** - Making-Of Serious Sam 3: BFE video featuring behind-the-scenes footage and exclusive developer interviews with Croteam members. This documentary takes a look at how the game was made, going all the way back to the roots of this award-winning Serious Sam series that took the world by surprise in 2001.
  
• Digital Artbook*** - The digital art book contains 42 pages of stunning full color artwork from a famous comic book artist Stjepan Sejic (a.k.a. Nebezial and Shienez on devianART), famous for his illustration work on Witchblade and now on his own comic books Ravine and Sunstone!
  
• Box Art*** - Includes DVD label and DVD sleeve (front and back), so you can create your own retail Serious Sam 3 DVD box!
  
• Posters - Featuring 5 high-res images of Serious Sam, Scythian Witch-Harpy, Scrapjack and Witch-Bride of Achriman, and all created by Sejic!
  
• Videos*** - Collection of high-res promotional Serious Sam 3: BFE trailers and videos, including official Serious Sam 3: BFE Trailer, Help-Line Videos and more.

* All songs are presented in AAC, FLAC and WMA formats and placed in your Serious Sam 3 folder in the Steam Directory: ...Steam\steamapps\common\Serious Sam 3 Serious Digital Edition Bonus\ (Soundtrack_Aac\, Soundtrack_Flac\ and Soundtrack_Wma\)
** This item is only available in Croatian audio with English sub-titles
*** These items are only available in English