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Serious Sam 4 on Steam
Serious Sam: the First Encounter (here, in pack with Second Encounter in one pack, "classic revolution") from 2001 is great "mindless but fun" FPS with tons of enemies to kill, especially in
Serious Sam Classic: The First Encounter on Steam
Serious Sam HD: The First Encounter on Steam
Serious Sam: The First Encounter - Wikipedia
Serious Sam Classic: The First Encounter on Steam
Serious Sam: The First Encounter on GOG.com
