Valhalla is a very special game: It was the first Amiga adventure with digitalized speech output in the whole game. This was one thing that made the game so popular. Other positive things in this game are the storyboard and the nice gfx. The game is a top-down adventure using a joystick- and icon-based control system. When you walk up to an object you wish to investigate, press fire to gain access to the icons at the bottom of the screen, with which you can look at, pick up or use an object. There are also people who will talk to you.
Source: www.mobygames.com