BattleMaster is a team-oriented browsergame merging strategy and roleplaying. It is set in a low-fantasy middle-ages world and players take the role of nobles and lords.
BattleMaster is a light-weight game that can be played alongside your other activities. Although you can delve deeply into it and spend more time on it, about 15 minutes per day are enough for regular play, and 5 will do if you are in a hurry.
BattleMaster is also a game under active development. New features are being added and gameplay and balance are constantly tweaked to improve the game further. You can talk directly to the developers at the forum.