How to add path with space in Bash variable

mount /dev/sda9 "$games"

As mentioned, always quote variable dereferences. Otherwise, the shell confuses the spaces in the variable's value as spaces separating multiple values.

When variable contains spaces, variable expansion and then word splitting will result to many arguments, echo command will display all arguments but other program or function may handle arguments another way.

Surrounding variable with double quotes will prevent arguments to be splitted

printf "'%s'\n" $games

printf "'%s'\n" "$games"