Once you've inserted a coin into the cabinet of Namco's Japan-only 1990 baseball arcade game Kyuukai Douchuuki, the text "PUSH START BUTTON START1 1PLAY" will flash up on the screen; however, if you choose to insert another coin into the cabinet, the text "START2 1PLAY+2PLAY" will flash up below it. You will then have to press that 1 Player Start Button (if you had only inserted one coin into the cabinet) or that 2 Player Start Button (if you had inserted two coins into the cabinet) in order to proceed to the league selection screen, as the game's introductory theme starts to be heard from the Yamaha YM-2151 - and you will then have thirty seconds to select one of this game's seven leagues upon the world map, by pushing the joystick to the left and right before pressing the first button to confirm your choice. You will then be given thirty more seconds to select one of the teams from the list of your chosen league (the Japan League has twelve, but the other six only have four) by pushing the joystick up and down before pressing the first button to confirm your choice; if you had only inserted one coin into the cabinet and pressed the 1 Player Start Button, you will now have to select a league and one of its teams for the CPU to predetermine the behaviour of before the game proceed to the pitcher selection screen, but if you had inserted two coins into the cabinet and pressed the 2 Player Start Button, the second player will have to select a league and one of its teams to take control of (which is too bad if the first player had chosen the team he wanted to take control of), before the game proceed to the pitcher selection screen. You will then have ten more seconds to select one of your chosen team's pitching quartet, by pushing the joystick to the left and right, before pressing the first button to confirm your choice - and all 144 pitchers have different maximum speeds (along with "straight", "curve", "shoot", and "fork" levels), so you should select the one that you think will be best for you. If you had only inserted one coin into the cabinet and pressed the 1 Player Start Button, the CPU will now give you the illusion of randomly selecting one of its team's four pitchers to predetermine the behaviour of (but it will always stop on the first one); however, if you had inserted two coins into the cabinet, and pressed the 2 Player Start Button, the second player will have to select one of his chosen team's pitching quartet to take control of before the game randomly decides which team will be pitching and which team will be batting (but if you had only inserted one coin into the cabinet and pressed the 1 Player Start Button, your team will always be batting and the CPU's team will always be pitching until the third out occurs). An opening quote will then appear upon the screen (and given that there are 1260 possible team combinations, there are 1260 opening quotes) before a full view of the stadium where this match will be taking place in (the Japan League has five of random selection, but the other six leagues only have one) appears on the screen with the Katakana text of "プレイボール!" (lit. "Play ball!") superimposed over it - and the introductory theme you had been hearing from the Yamaha YM-2151 since you had pressed either of the game's two start buttons will fade out. The match will then start, with pitching and batting.
Pitching[edit]
Push the joystick to the left and right to move your chosen team's chosen pitcher from side to side on the pitcher's mound (the catcher's hovering mitt will also move with him), then press the first button to make him throw the ball (the catcher will also move to the positions where his mitt had been hovering once you've done this); push the joystick left if you want the ball to curve horizontally, down-left if you want it to curve vertically, right if you want it to shoot horizontally, down-right if you want for it to shoot vertically, down if you want it to fork, and up if you want it to be speed ball. If the other player's team's current batter failed to hit it, the Katakana text of "ストライク" (lit. "Strike") will appear above the umpire (who is standing behind the catcher) and the speed at which the ball had travelled will appear below it in kilometres - and a yellow circle will then appear next to that letter "S" (for "Strikes"). You'll both then have to repeat the pitching process, but if the other player's team's current batter fails to strike the ball again, that Katakana text "ストライク" (lit. "Strike") will again appear above the umpire and the speed at which the ball had travelled will again appear below it in kilometres; another yellow circle will then appear next to the letter "S" (for "Strikes"), and you will have to repeat the pitching process again. If the other player's team's current batter fails to hit the ball (once again), the Katakana text "バッターアウト" (lit. "Batter Out") will appear above the umpire and the speed at which the ball had travelled will once again appear below it in kilometres, as the other player team's current batter disappears - and the two yellow circles that were next to the letter "S" (for "Strikes") will then disappear as an orange circle appears next to the letter "O" (for "Outs") and the other player's team's next batter is brought in (with different "technic", "power", "running" and "condition" levels).
Batting[edit]
Push the joystick to the left and right to move your chosen team's current batter from side to side upon whatever side of the catcher's plate he is standing, then press the first button to make him swing or the second button to make him bunt; once he has struck the ball, the view will change to a shot of the field as it flies up into the air. If the ball lands within the white lines, the Katakana text "フェア" (lit. "Fair") will appear in the top-left corner of the screen - but if it does not land within the lines, the Katakana text "ファウル" (lit. "Foul") will appear in the top-left corner of the screen, and it will be counted as a strike (this will be reflected by the yellow circle that has appeared next to the letter "S" once the view has returned to that screenshot you see on the right). Also, if your chosen team's current batter hits that ball so hard that it flies out of the stadium, the Katakana text "ホームラン" (lit. "Home run") will appear on the screen with the current score and the distance that the ball travelled in metres below it as audiences cheer on.
Throwing[edit]
If the ball landed within the white lines and the Katakana text "フェア" (lit. "Fair") appeared in the top-left corner of the screen, after your chosen team's current batter hit it, and one of the other players on your chosen team caught it as it fell back down to the ground, you will have to press the first button to make him throw it to one of the other players while pushing the joystick up and down to indicate which player you want him to throw it to; once you have done so, the Katakana texts "セーフ" (lit. "Safe") will appear in the top-right corner of the screen if the player was safe, or another Katakana text "アウト" (lit. "Out") will appear in the top-right corner of the screen if he was out (as the translation suggests, this will also be counted as an out, and it will be reflected by that orange circle that has appeared next to that letter "O" once the view has returned to that screenshot you see above). The radar of the field at the bottom of the screen shows the positions of the other team's players (which are indicated by the moving hats).
Stealing[edit]
When your chosen team is batting and the other player's chosen team is pitching, push the joystick up and press the first button to tag out a runner upon the other player's chosen team who is attempting to steal a base (they can be seen in the windows on the left side, top, and right side of the screen); once you have done so, the runner will run out of sight from the left side of the window as the other player's team's chosen pitcher throws the ball. Once your chosen team's current batter has struck the ball, the view will again change to a shot of the field, as it flies into the air, but the other player's team's chosen pitcher will then run off the pitcher's mound and onto the catcher's plate - and you'll then have to push the joystick to the left and press the first button to make your chosen team's runner start running, then push the joystick up, and press the second button to make him run back again. Once three outs occur, the players will run off the field as the Katakana text of "チェンジ" (lit. "Change") flies across the screen.
It shall now be your chosen team's turn to pitch and the other player's (or the CPU's) chosen team's turn to bat; once three more outs occur, the players will run off the field as the Katakana text of "チェンジ" (lit. "Change") flies across the screen again (if the losing team are down by more than ten runs the Katakana text "ゲームセット!", lit. "Game set!", will appear on the screen as the players run off the field for a second time). However, if they were not, the game will continue for up to three more innings, or up to fifteen minutes have passed (depending on what the arcade operator has set the "CONTINUE" setting in the game's option menu to) - and you will have to insert another coin into the cabinet and press either Start Button within ten seconds in order to continue your game. However, after the losing team go down by ten runs in the bottom of any inning, the score is not tied after three outs occur in the top of the ninth inning, or three outs have occurred in the bottom of the ninth inning, the Katakana text "ゲームセット!", lit. "Game set!", will appear on the screen regardless of what has happened as the players run off the field for a final time; the final result will then be delivered on a large television screen by Valkyrie (as in no Densetsu, which was released in the previous year and also ran upon Namco System 2 hardware, and Pac-Man can also be seen on three of those smaller television screens in his anthropomorphic form, wearing a purple bow tie), before a full view of the stadium that the match had taken place in appears on the large television screen and spins around rapidly in a clockwise direction before fading out. The text of "GAME OVER" will then appear on the screen before the game goes back into attract mode - and much like in World Stadium and World Court, there's no high score table.