Mutation

Mutation is an achievement in Metro Exodus that was added in the Ranger Update.

Overview
After finishing the game at least once, the player can start a new playthrough using the New Game+ feature. This allows the player to choose additional modifiers which will affect the playthrough, such as making bad weather more frequent, making radiation zones more common or allowing the player to use any weapons and equipment collected in the previous playthrough right from the start. This achievement is obtained by choosing at least one of the modifiers and then finishing the game on any difficulty.