Facebook's Instant Games was first launched in 30 countries like, United States, Germany, Sweden, Belgium, France, Great Britain, Denmark, Spain, Australia, Canada, New Zealand, Austria, Italy, Russia, Singapore and others running on selected iterations like Android 5.0, iOS 8.0 and above.
Here is the list of Instant Games on messenger;
Words with friends:frenzy
Track &field 100m
Shuffle cats mini
Word a lot express