Here are some awesome SIM horse games for you to try. These games are usually built around a community of players who interact with each other. Some are NOT appropriate for players under the ages of 13 (or in some cases, 15) so please be sure to read the instructions first!
If you are looking for games where you take care of horses, ride them. etc. you may be interested in our online horse games page.
Hunt and Jump Inc
This is a new horse sim game one of our HCG's told me about. Try it and let me know what you think of it!