                                INSTRUCTIONS

I.  OVERVIEW

      Netris takes the classic Tetris arcade game and adds several new features
to create a new, unique form of entertainment. The Netris playing area
is a 22 row by 10 column grid. Like Tetris, pieces consisting of four
adjacent blocks fall from the top of the screen until they come to rest
at the top of the block pile. By rotating the pieces and moving them
side to side, the player can control where the pieces land and how they
fit into the pile. When a complete row of the grid is filled, the blocks
of that row are removed from the pile. Every so often, a special piece
will appear at the top of the screen and begin falling. There are five
such pieces: Small Bombs, Big Bombs, Guns, Mashers, and Inverters. Each
piece has its own unique characteristics which will be discussed in
section III. The game is ended when the pile has become so high that the
newest piece no longer has room to enter the grid.







II. KEYS

Following is a list of keys and their functions

KEY    NAME                 FUNCTION

8      PAUSE              Pauses the game

4      LEFT               Moves pieces to the left

6      RIGHT              Moves pieces to the right

2      DROP               Drops pieces to the top of the pile

5      ROTATE/FIRE        Rotates standard pieces counterclockwise
                             Fires guns and inverters
9      PREVIEW            Toggles on and off the preview of the next
                             standard piece.
s      SOUND              Toggles sound on and off

q      QUIT               Immediately ends game and returns to title screen



III. SPECIAL PIECES
  There are five special pieces in NETRIS.  Each of these pieces
disappears from the grid after its functions have been completed. They
are as follows:

SMALL BOMBS:  Small bombs begin appearing on level one. When a small
              bomb strikes a block, the bomb and the block are
              annihilated.
BIG BOMBS:    Big bombs begin appearing on level two. When a big bomb
              strikes a block, a four by four section of the grid is
              cleared.
GUNS:         Guns begin appearing on level three. When fired, the gun
              shoots downward, destroying the first block it hits. The
              gun can be fired repeatedly until it has fallen to the top
              of the pile and can fall no further.
MASHERS:      Mashers begin appearing on level four. When a masher lands
              on the pile, it compresses the column beneath it,
              eliminating all empty grid spaces in that column.
INVERTERS:    Inverters begin appearing on level 5. When fired, the two
              columns beneath the inverter are inverted, empty spaces
              being filled, and filled spaces being cleared. Each
              inverter can be fired only once.


IV.    SCORING

Each time a standard piece lands, you receive 10*(row+level) points,
where the bottom row is considered row 0. If the piece has been dropped
from a higher row, the score is doubled.

When a complete row has been filled, a line is scored, and the row is
removed from the grid. The level increases after every 10 lines. Scoring
for completed rows depends upon how many have been filled
simultaneously. Single lines score 100 pts; Doubles score 400; Triples
score 900; and Quadruples (known as Tetrises) score 2500. In Netris, it
is also possible to complete five or more lines at once, using the
masher or the inverter. Such a feat is called a "Netris", named after
the game. Netrises score 100*(n+1)^2 points, where n>4 is the number of
simultaneous lines.

Special pieces also use the 10*(row+level) formula for scoring. For
bombs and guns, points are awarded for each block destroyed. For the
inverter, each block inverted scores points. For the masher, points are
awarded for each space that is eliminated from the mashed column.

You are now ready to enjoy playing Netris!















