Heroes play alone, and they play for Glory. You will gain glory by performing heroic deeds - and by bragging about them to the Tavern keeper.
You can help a Kingdom invade another Kingdom by leading their army. You can perform heroic feats. You can duel with another Hero. You can ask the Gods to bless you. There are linked feats that involve Kingdoms and other Heroes, and if you can complete all of the feats this will constitute a Quest and is truly glorious.
You will find and win magical items that can help you, and if you are wounded then you may be healed by a passing Druid from an ancient Kingdom.
Only one Hero can be the best - will it be you?