Simplify the following text for a Grade 8 native English-speaking person.
Original: Straight pool was the game of championship pocket billiards competition until approximately the 1980s when it was overtaken by `` faster '' games such as nine-ball .
Simplified: Straight pool was the game of championship pocket billiards competition until approximately the 1980s . Then , it was overtaken by `` faster '' games such as nine-ball .