Shadow of the Tomb Raider: The Nightmare expands the thrilling adventures of Lara Croft, inviting players into the haunting atmosphere of Croft Manor. This expansion features both single-player and co-op modes, providing a fresh experience as players face off against iconic foes and allies. The new challenge tomb, 'Howl of the Monkey Gods,' allows players to earn a powerful weapon while navigating through intense gameplay. Players can also enjoy enhanced customization options and skills that enrich their journey.

New gameplay elements include the Scales of Q outfit, which offers increased resistance to melee attacks, and the Grip of Fear axe, enhancing climbing and combat capabilities. The introduction of the White Breath skill provides a unique tactical advantage by creating a hallucinogenic cloud that turns enemies against one another. Furthermore, several main campaign tombs have been revitalized, now playable in Score Attack and Time Attack modes, adding depth and replayability to the experience.