The most common and most likely answer to this crossword clue is the 8 letter word SKITTLES
S
K
I
T
T
L
E
S
More clues leading to the result SKITTLES
Buddy explains!

The straight part
We know that "game" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case game = skittles.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SKITTLES mean?
SKITTLES noun- One of the wooden targets used in skittles.
- (mostly British) A pub game in which a ball is rolled down a wooden alley in order to knock down as many of the nine skittles as possible.
- An informal form of chess played without a clock.