Games Like Serious Sam: Siberian Mayhem

Shadowgrounds

Alien Shooter

Zombie Shooter

Serious Sam HD: The First Encounter

Serious Sam Classic: The First Encounter

Serious Sam Classic: The Second Encounter

Serious Sam 3: BFE

Singularity™

Serious Sam 2

Serious Sam Classics: Revolution

Serious Sam 4

Serious Sam VR: The Last Hope

Serious Sam Fusion 2017 (beta)

Atomic Heart

Seraph's Last Stand