Hello all,
I have tried to activate the campaign mode in battle isle 2 and 3 but i was not successful.

Can anyone help me what to do to play a campaign?

Thanks in advance

Battle Isle 2 should throw you into the campaign mode when you first start the game.

As for Battle Isle 3, select the "Start New Campaign" option, set your difficulty level and then press the "X". I know it looks a bit like a "Cancel" button, but it'll take you to the first mission.