CREATE TABLE const_gametype (
  key            integer PRIMARY KEY,                             -- primary key
  boxsizeid      integer NOT NULL REFERENCES const_boxsize(key),  -- boxsize foreign key
  headtracking   boolean NOT NULL,                                -- headtracking on / off
  stereo         boolean NOT NULL,                                -- stereo vision on / off
  shadow         boolean NOT NULL                                 -- shadow on / off
);