This 2001 main game is a high-adrenaline, arcade-style First-Person Shooter where you play as Serious Sam, battling hordes of monsters sent by the entity Mental across ancient Egyptian and alien locales. The core gameplay loop demands constant movement and aggressive engagement against overwhelming numbers of enemies, including the Headless Kamikaze and massive bosses like Ugh-Zan. It blends sci-fi and fantasy elements, focusing purely on frantic, non-stop action across its campaign, which has seen at least one remaster update.
The fundamental appeal of this title lies in its relentless, fast-paced combat loop. Unlike many shooters that emphasize cover mechanics or tactical positioning, this game demands constant movement and aggressive engagement. The design philosophy leans heavily into classic arcade action, where survival depends on managing large waves of enemies through sheer firepower and spatial awareness.
The atmosphere mixes advanced technology with mystical elements, creating a unique backdrop for the conflict. Players navigate expansive, often open environments, confronting an overwhelming number of hostile creatures commanded by the central antagonist.
The combat is characterized by its sheer volume of enemies appearing simultaneously. Players will face over fifteen distinct types of nightmarish warriors in Mental's army. Notable adversaries include the rapidly charging Sirian Werebull and the instantly recognizable, screaming Headless Kamikaze. The game culminates in confrontations with massive, multi-story boss characters, such as Ugh'Zan.
As a main game release, the experience is self-contained. There are no official downloadable content packs (DLCs) or expansions associated with this specific version. The game has received at least one remaster, updating the experience for modern hardware and audiences.
The game is available on PC (Microsoft Windows) and the original Xbox console, having launched in 2001.

A remake of the Serious Sam prototype based on all the leaked code leftovers and original assets from the alpha build. They are fixed and ported to game by Zdzichu.

Realm of Thoth is a huge campaign made by talented SED1 mappers. The project was being worked on for 9 months and the idea was to make a full campaign working as a team. 5+ hours of content 9 beautiful diverse maps to explore 48 secrets to find 4000+ enemies to slaughter List of participants and maps they worked on: Wolf - Intro & The Cosmic Egg Laki - Garden of Thoth & The Way of Knowledge StormCatcher.77 - Lightbringer Unserious Dude - The Way of Knowledge Georgg14 - The Red Pyramid of Sneferu HoBu4oK - Kingdom of Sebek & Sacramental Path Maska322 - Hermopolis & The Cosmic Egg Mapping event hosted by HoBu4oK

Serious Sam VR: The First Encounter is a frantic arcade action FPS, featuring singleplay and co-op campaign, various multiplayer modes, all presented in glorious VR and with different locomotion movements.

Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS.

Official Deathmatch mode for Serious sam Classic by Croateam

A port of Serious Sam: The First Encounter and Serious Sam: The Second Encounter for Xbox that compiles them into one cohesive game. Features a visual makeover with a redesigned menu and main character model which are far more cartoonish, alongside expanded story cutscenes.
