Virtua Tennis - Platform: Dreamcast

Play against Master and King: 
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Successfully complete arcade mode using no continues 
and without losing a round on the normal difficulty 
setting to play against Master in singles and Master 
and King in doubles. This can be easily done if the 
match is set to one round.  

Play as Master: 
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Defeat Master in singles in arcade mode to unlock him 
in arcade and training modes. 

Play as King: 
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Successfully complete all 22 trial and 24 training 
levels in world circuit mode to reach the number one 
ranking and have King challenge your player. Defeat King 
to unlock him in arcade and training modes. 

Underarm serve: 
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To do an underarm serve, press A + X + Down while at 
near court, or A + X + Up while at far court. 

Sunflower costume: 
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Successfully complete the big wall training level 
with at least ten seconds left on the timer to unlock 
costume no. 22.

Tambourine costume: 
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Successfully complete the bull's-eye training level with 
a score of at least 7000 to unlock costume no. 23.  

Camouflage costume:
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Successfully complete the cannon training level before 
the timer turns red to unlock costume no. 24.