Cheat Method
Edit your soccer.ini file in your game directory and add the following lines for cheats, then run game as usual:

Enable Auto Tackling
AUTO_TACKLING=1

Enable One On One Playmode
ONE_ON_ONE=1

Run Game In A Window
WINDOWED=1

Goalkeeper Becomes Very Good
ABSOLUTELY_PERFECT_GOALIES=1

Equal Team Stats
CHEAT_EQUAL_TEAM_STATS=1

Enable Aggressive Tackle Cheat
AGGRESSIVE_TACKLE_CHEAT=1

Enable Practice Mode
PRACTICE_MODE=1

Seoul stadium:
Win the International Cup to unlock the Seoul stadium.

Stade de France stadium:
Win the Club Championship to unlock the Stade de France stadium.

Easy goals from halfway
When you start a match, change controls to the other team and hold (Keeper Rush) for the goalkeeper to rush out and get the ball. Pause game play while still holding (Keeper Rush) and change back to your side. The other goal keeper should keep rushing out and slide tacking you. Shoot from halfway and you should get a goal. Also for laughs, sometimes the goalkeeper grabs the ball meters from the box and nothing happens.

Easy victories:
First, win a couple of matches in season or tournament mode. Save the game, then see what your next match is. Select "Simulate". If you lose that match, exit the mode and reload your game. With every win, save the game. This will ensure that you finish first.

Hurt the goalkeeper:
Slide the goalkeeper from the front. You will not get a card. The opponent's keeper might have an injury.

Overall ratings:
Although you usually pay attention to overalls, as long as your player has good shooting, running, or fitness, he is usually very good. Note: nine and eight shooters are actually also good.