Here is the full list of all 24 ORR achievements.
Completed Race 24
Completed Race 23
Completed Race 22
Completed Race 21
Completed Race 20
Completed Race 19
Completed Race 18
Completed Race 17
Completed Race 16
Completed Race 15
Completed Race 14
Completed Race 13
Completed Race 12
Completed Race 11
Completed Race 10
Completed Race 9
Completed Race 8
Completed Race 7
Completed Race 6
Completed Race 5
Completed Race 4
Completed Race 3
Completed Race 2
Completed Race 1