noun
Literal use for a sudden death is possible but uncommon in ordinary Japanese; 突然死 is the usual plain term for this meaning.
「サドンデス」とあるが、ここでは競技方式ではなく突然死の意味だ。
It says “sudden death,” but here it means an actual sudden death, not a competition format.
noun
sudden-death playoff; golden-goal playoff
Sports and game term for a tie-breaking format where the next score, point, or win immediately decides the result.
PK戦は五人ずつで決まらず、サドンデスに入った。
The penalty shootout was not decided after five players each, so it went into sudden death.
延長戦はサドンデス方式で行われた。
The extra period was played under sudden-death rules.