After some time of not getting hit or killing the last enemy that has aggro towards you, you will leave Combat Mode again. Certain actions like riding aren't available in Combat Mode. Your character will pull out his/her weapon and slow down while walking. In the worst case it's better to leave than to ruin your day because of one or two people. If a group or dungeon run doesn't work out, don't get upset over it. The EU version is now available on Steam, but this guide was made for the NA version. The EU version, hosted by Gameforge, is not available on Steam. This means you're playing on servers in america.
This is the NA version of the game, hosted by En Masse Entertainment.TERA is no point-and-click or tab-targetting MMO.