Due to the larger and more complicated maps with larger groups of monsters, the game had somewhat higher system requirements than the original. However, because the levels are non-linear players can wander off the beaten path, and those that do are often rewarded with bonuses, like health pickups and more powerful weapons. As with its predecessor, Doom II's levels can be completed in a straightforward fashion.

Levels are completed by finding an exit, whether it be a door, elevator etc., the goal is still simply to advance to the next area. Each level is infested with demons that can be killed with a variety of weapons that can be picked up throughout the game. The game still consisted of the player navigating large non-linear levels. Instead, the development team took advantage of advances in computer hardware since the release of the original game that allowed them to do more with their game engine by making much larger and more intricate levels.

There were no major technological developments, graphical improvements, or substantial gameplay changes. Doom II was not dramatically different from its predecessor.

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