Invisible Mode is a game mode in Resident Evil: Revelations 2. It must be unlocked for each episode individually by simply completing the episode, and it can be purchased for 1000 BP per episode in the Rewards menu.
In this mode, all enemies are invisible. Moira's flashlight and Natalia's pointing ability can briefly reveal enemies. Like in the main campaign, Natalia is able to see an aura where an enemy is located.
Just like in Countdown Mode, all episodes have a pre-determined starting loadout for both characters and the Workbench cannot be accessed while in this mode. Any inventory progress will also not be saved in-between episodes, so if ammo is picked up in one episode, it will not show up in the other and will instead be replaced by the pre-determined starting loadout.