Beyond the standard arsenal, Revolution includes weapons previously found only in specific mods or scenarios: : Found as a secret in The Second Encounter . Plasmathrower : A secret weapon also located in TSE.

: You can re-enable classic environmental audio effects (reverb) using tools like Creative ALchemy.

: The classic Egyptian campaign where Sam first travels back in time to stop Mental's forces.

: Originally labeled as impossible, players have unlocked it by surviving a fight with exactly 1 HP (e.g., getting down to 1 HP, picking up the flamethrower, and killing a scorpion).

: Finish the first level of TSE with fewer than 8 kills on at least normal difficulty.

These walkthroughs and guides cover secret locations and high-difficulty strategies for the Revolution campaign:

: Some players use shared community save files to quickly trigger grind-heavy achievements like "Sam I Am" (100,001 kills) or the "Who needs kills" challenge.