Doom released about 1 year after the A1200.

Then it seemed that most of the top Amiga development talent focused their efforts on trying to imitate Doom on the Amiga, with minimal success, rather than making the most of what AGA Amigas were actually capable of.

There are quite a few, but by the time A1200 came out, some developing houses like Electronic Arts were already abandoning the Amiga.

I wouldn't be surprised if EA abandoned the Amiga more because Trip Hawkins left in 1991 than because developing houses were abandoning the Amiga.

The largest number of Amiga games was in 1990 when it nearly tied with DOS, which was 4 years older than the Amiga and the Amiga games didn't really get rolling until the Amiga 500 in 1988.