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: Unlocked after one playthrough, this mode adds significant replay value by including tougher enemies and new weapon upgrades. Online & Co-op Experience
: Replaces the standard assault rifle and sniper with an AK-74MX and a Crossbow . New gadgets include hoverboard scooters and air strikes . Serious Sam Siberian Mayhem Online
Reviewers and fans often highlight the "pure fun" vs. technical shortcomings: : Unlocked after one playthrough, this mode adds
The game supports online cooperative play for the entire campaign and its expanded survival mode. : Unlocked after one playthrough
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