???
Stages is one thing, stage fatalities is another. There are 24 (+Kratos') stages, not counting day/night variants. You can perform a stage fatality on The Pit (Night), which sends them to The Pit Bottom. You can't perform a stage fatality in the Bottom, neither in the day variant (which the OT doesn't mention, so guess I'll fix that; but still...)
There are only 6 stages fatalities (9 if you count the 3 you can do on Kratos' stage):
1. The Deadpool: Sends the opponent to the acid-bath.
2. The Living Forest: Sends the opponent to a tree that eats half of the opponent.
3. Netherrealm: Grabs the opponent and puts his/her face on lava.
4. The Pit: Sends the opponent to the bottom-spikes.
5. The Street: Throws the opponent to an upcoming car, which blows the head of him/her
6. The Subway: Smashes the opponent's face into a passing train then throws him/her to the opposite passing train.