On PC, open the in-game console—usually with the tilde key, just left of 1 on a US keyboard—then enter cht_bEnableCheats=1 to enable standard cheats. For hidden secrets, explore each of the campaign’s five chapters for concealed routes, breakable objects, and environmental interactions; the documented guides list 16 secrets in Chapter 1 and 27 in Chapter 3.
How to cheat in Serious Sam: Siberian Mayhem?
Serious Sam: Siberian Mayhem is a standalone expansion to Serious Sam 4, developed by Croteam and Timelock Studio and published by Devolver Digital. Croteam said in its January 25, 2022 announcement that the expansion works whether or not you have played Serious Sam 4. The game is available on Steam as a single-player title with online co-op, Steam Workshop, a level editor, and 51 Steam achievements. Its campaign comprises five levels with side missions and hidden secrets.
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Open the PC console and enable commands
- Open the console. Press the tilde key (
~), typically the key left of1on a US keyboard. Keyboard layouts differ, so that key may not work on every setup. - Check the available commands. Type
chtand pressTabto browse the console’s autocomplete suggestions. - Enable standard cheats. Enter
cht_bEnableCheats=1. The documented commands generally use an equals sign and a value; for on/off settings,1means on and0means off. - Enable developer cheats if needed. Some commands require
cht_bEnableCheats=3, the developer-cheat level. Check autocomplete for the command’s exact spelling and parameters.
These are PC console instructions from game-specific guides, not a promise that every command or key mapping works on every keyboard configuration. The Steam listing also supports controllers, but the cited guides describe console entry with a keyboard.
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| Command | Effect |
|---|---|
cht_bGod=1 |
Enables god mode. |
cht_bFly=1 |
Enables flight. |
cht_bGhost=1 |
Enables noclip movement. |
cht_bTurbo=1 |
Increases movement speed. |
cht_bInfiniteAmmo=1 |
Enables infinite ammunition. |
cht_bGiveAll=1 |
Gives all weapons and maximum ammunition. |
chtJumpToChapter() |
Jumps to a chapter. |
chtJumpToNextLevel() |
Jumps to the next level. |
cht_bEnableCheats=0 |
Disables cheats. |
Guides also list commands involving ammunition, weapons, armor, health, skill points, invisibility, killing enemies or bosses, and resetting progress. Because the exact parameters may vary by command, use the console’s autocomplete rather than guessing at a value.
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Achievements and save precautions
The sources reviewed do not establish whether enabling cheats disables Steam achievements in Siberian Mayhem. If you want to preserve an unmodified playthrough, use a separate save or run as a precaution; this is not a confirmed game rule.
How to find all the secrets in Serious Sam: Siberian Mayhem?
The campaign has five chapters, but the cited guides do not establish a fully cross-checked secret count for all five combined. Secret routes vary by chapter and can involve taking side paths, interacting with machinery, breaking objects, or entering concealed spaces. The counts and examples below are limited to chapters for which the cited guides provide specific information.
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Chapter 1: “A Smell of Petroleum Prevails”
A chapter guide lists 16 secrets here, including ammunition, traps, armor, rockets, explosives, a looped portal, and a classic arena. Look for ways off the main route and inspect breakable structures rather than following the road alone.
- After docking the boat: check the floor debris beside a large pipe for ammunition.
- Near an abandoned shack: a rocket launcher is hidden beneath wooden flooring.
- Later in the level: breaking crates and destroying a concealed wall opens access to a classic arena.
Another walkthrough describes alternate routes, so treat these as landmarks rather than a guaranteed step-by-step route; the exact approach can differ between guides.
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Chapter 3: “Siberiade”
A chapter guide reports 27 secrets. One documented example is triggered near the rail tracks: activate the inactive machinery to summon oil elementals. Inspect machinery and nearby routes as you progress rather than treating the tracks as scenery.
Chapters 2, 4, and 5
The cited material does not provide chapter-by-chapter counts or sufficiently cross-checked landmarks for these levels. Explore side routes and test conspicuous breakable objects or inactive environmental elements, but do not treat that general advice as a verified location list or assume a total for the full campaign.
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