"Collection of stuff, related to Serious Engine games:

Serious Sam Palm OS (USA Box);
The First Encounter (USA Big Box);
The First Encounter (USA Jevel);
The First Encounter (Demo);
The First Encounter (Special Edition);
The First Encounter (Special Edition - Mint Unopened);
The Second Encounter (USA Small Box);
The Second Encounter (USA Big Box - Mint Unopened);
The First Encounter (Russian Jevel);
The Second Encounter (Russian Jevel);
The First Encounter (European CD in DVD Box);
The First Encounter (European CD in paper envelope);
The First Encounter HD (Russian Jevel);
The Second Encounter HD (Russian Jevel);
The Second Encounter (European CD in DVD Box);
Gold Edition (European CD in DVD Box);
Gold Edition (USA Small Box);
Serious Sam II (USA Small Box);
Serious Sam II (European Big Box);
Gold Edition (Russian Jevel);
Serious Sam 3 (Russian Jevel);
Serious Sam 3 (European DVD);
Serious Sam (Xbox);
Serious Sam II (European Jevel);
Serious Sam II (Russian Jevel);
Nitro Family (USA Small Box);
Next Encounter (Gamecube);
Next Encounter (PS2);
Serious Sam II (Xbox);
Nitro Family (Russian Jevel);
Alpha Black Zero: Intrepid Protocol (Russian Jevel);
Alpha Black Zero: Intrepid Protocol (USA Small Box - Unopened);
Serious Sam Advance (GBA);
Serious Sam HD (Xbox 360);
Serious Sam Collection (Xbox 360);
The Talos Principle: Made of Words (Vinyl);
The Talos Principle (Switch Special Reserve Games Box);
Carnivores Cityscape (USA Small Box);
Euro Cops (Russian Jevel);
The Talos Principle (NTSC PS4);
The Talos Principle (PAL PS4);
The Talos Principle (Switch);
Deer Hunter 2003 & Bird Hunter 2003 (USA Small Box);
Serious Sam Xbox Official Strategy Guide;
Serious Sam 4 (PC Collectors Edition, Steelbook, Artbook, Vinyl, Minigun display sculpture)
Beheaded Kamikaze Figure (67/250)
Serious Bomb Figure (56/250)
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Pirated editions and games about Sam known in Russia and some of pirated copies (with poor Russian translation):

Serious Sam: Mummy;
Serious Sam: Bastion of Darkness;
Serious Sam: Mobius the Last Planet;
The Second Encounter;
Serious Sam Territory;
Serious Sam II;
Gold Edition;

(I couldn't fit all the boxes for the photo. There is more, actually)
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Undercode:

Enlightening the World (2002)
Post-Apocalyptic (2015)"