D2 is a survival horror video game developed by Warp for the Dreamcast. It was published by Warp in Japan in 1999 and by Sega in North America in 2000.

The game has a few different kinds of gameplay. The majority of D2 involves exploring the Canadian wilderness from a third-person perspective while interior locations are encountered in a first-person perspective. While exploring the wilderness, the player encounters random battles, much like those of a role-playing video game. When fighting monsters, the player cannot move Laura, but only aim her weapons. Defeating these creatures earns Laura experience points, which are used to level Laura up, increasing her health limit. Laura is initially equipped with a submachine gun with unlimited ammunition and a hunting rifle, which is used to hunt animals for meat which she can use to regain health.

In terms of the hunting feature, animals Laura kills for meat are totaled up during gameplay and on the Options screen, and players can see how many kills she has collected as well as any medals given. Additionally, Laura has a camera that she can use to take pictures any time in the game (except during cinematics). Players can also save the pictures to a VMU and view them later on.