Tomb Raider: Underworld is one of two mobile games that are based on the PC/console game with the same name. Both games feature the same plot. It starts in Baldr's tomb where Lara's task is to find Thor's helve. The player has to explore the tomb and find a key to the crypt. By following the trail of Thor's artifacts Lara hopes to be able to get to Avalon where she thinks her mother might be.
This version of the game uses polygonal 3D graphics and for the most of the time the player sees the action from a behind-the-shoulder third-person perspective. Most of the movement through the tombs is on-rails. The player can only move forward or backwards along a trail but not left or right. The exception is at certain intersections where it is possible to choose which path to take. Actions are context sensitive. For example jumping can be done when next to a gap or a ledge. Sometime Lara will slip from a ledge and the player then quickly has to press the button shown on the screen.
When combat occurs Lara will automatically draw her weapon and the player can then move her in all directions while shooting at the enemies. To dodge attacks it is possible to somersault left, right and backwards. The combat ends when all enemies have been killed.