We Love It's Guide to…
A hub for Serious Sam’s HD encounters and BFE, where you sprint through alien hordes, switch campaigns, and play co-op.
Blast Alien Hordes
Switch Campaigns Mid-Game
Play Split-Screen Co-op
Serious Sam Fusion is a central hub for several existing Serious Sam games developed by Croteam. Cool new features, engine upgrades, patches and updates will be released to existing owners for FREE!
Developed by Croteam · Published by Devolver Digital, Croteam









Serious Sam Fusion 2017 is a shared platform for Serious Sam HD: The First Encounter, The Second Encounter, and Serious Sam 3: BFE, rather than a new standalone campaign. It brings these games together in one application, letting players choose a campaign or jump between levels from different games.
Across the included campaigns, players face waves of aliens in arena-like encounters. Combat centers on constant movement, dodging enemies, and using a range of firearms to clear the way; the games also include secrets and varied levels.
Fusion adds shared features around the games, including a common Workshop with cross-game mods, split-screen and online multiplayer, and support for VR versions playing with non-VR versions. It also offers updated engine features such as 64-bit executables, Vulkan support, controller options, and cloud saves.
Players who enjoy Fusion often value having the included games in one convenient hub, along with Workshop mods and the fast, chaotic shooting in the campaigns. Some also praise playing co-op and the updated technical features. Other reviews criticize persistent bugs, the long-running beta status, and enemy behavior that can make difficult encounters frustrating, so experiences with the unified versions are not uniformly positive.
| Platforms | Windows, macOS, Linux |
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| Achievements | 76 |
| Age ratings |
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| Players | 1–16 |
| Play modes |
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| Other modes |
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| Multiplayer | Serious Sam Fusion 2017 supports online PvP, online co-op, shared/split screen PvP, and shared/split screen co-op. Official store features confirm cross-platform multiplayer, and the description states VR players can play multiplayer with non-VR players. Server browsers and multiplayer lobbies are unified across supported Serious Sam games, with cross-game server listing and map voting. |
| Multiplayer & mods | The game has Steam Workshop support, a common workshop, and cross-game mods. The description also mentions improved scripting with better support for scripting networked games. No specific limits or compatibility rules for modded multiplayer are stated. |
| Controller support | Xbox |
| Controller required | No |
| Content notices |
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| Website | Official website |