Tunnel Runner

Tunnel Runner is a game viewed in the first person perspective (the player is never shown onscreen), which requires the player to maneuver their way through a series of mazes, find a key in each one while avoiding its denizens known as Zot Monsters, and escape in order to advance to the next maze (known as "Runs").

Controls

 * Move (four directions)--joystick
 * Check map—button
 * Activate Door—up on joystick
 * Emergency warp (once per level)--jostle joystick in all directions while pressing button

Gameplay
Once a new game is started, a maze is briefly shown in an overhead view, which is then changed to a first person perspective with the player facing forward. Pressing the button on the controller will bring up the player's map, which shows various objects and maze content, depending on what level the player is on. Originally everything is shown on the map, which includes the maze, Zot Monsters, the player (represented by an arrow), the key and the exit.

The player must travel about the maze, pick up the key, and make their way to either a Single Up or Double Up door in order to escape from the maze and advance to the next one. Being caught by a Zot Monster will result in the player losing a life; once the player is out of lives the game ends.

There is also a timer at the bottom of the screen, represented by a bar; if the player runs out of time before exiting, they will have to go through that level again.

An emergency warp can also be used once per level if the player becomes trapped, which will warp the player to another area of the current Run. A Transport Door also has the same effect.

Doors/functions

 * Single Up Door—advances to the next level, marked by a single arrow pointing up
 * Double Up Door—skips a level, although the player must first locate the Run's Single Up Door and view it before this Door can be activated (marked by two arrows pointing up; double points are also scored upon exiting a Run as a bonus as well)
 * Down Door—takes the player back down to the previous Run. No points will be scored during this Run (marked by two arrows pointing down)
 * Transport Door—warps the player to a random area of a Run (marked by two arrows on the sides of the Door, pointed inwards)
 * db/cb Door—if the player runs across one of these, they will receive a bonus of approximately 1000 points. However, if the player faces another direction or looks at the map before the points are tallied, the bonus will stop.  These start appearing on the ninth Run and on

Also, the timeline will freeze whenever the player enters a Door area, which is marked by a shiny area on the floor. The player's momentum will also be halted.

Zot Monsters

 * White—fairly fast and smart
 * Grey—slow and stupid
 * Red—fast and smart
 * Blue—fast but stupid

Difficulty increases

 * The game starts out slow, but then the player's speed increases with the more Runs they clear. Running through levels is not always a good idea though, as the player could run into a Zot Monster by accident and die
 * More Zot Monsters are added as the game progresses and they move faster as well
 * The walls of some Runs aren't shown on the map, but are replaced with areas being filled in on the map as the player moves through them
 * During some Runs, none of the maze walls are shown at all
 * The exit disappears
 * The key's location disappears
 * The player isn't shown during certain Runs on the map
 * Certain areas of the game have walls that are pitch black and are impossible to tell what kind of a Door the player is at, since the Doors are marked by one or more black arrows, which can't be seen during these Runs

Scoring

 * One point per room upon initial entry during a Run times the Run number
 * Bonus for time left over at the end of a Run
 * db/cb Door bonus (varies)

Links

 * The Atari Times review (95%)