Firebird Software Ltd(First Floor, 64-67 New Oxford Street, London, WC1A 1PS, England). They were part of British Telecom.
For more information, see Rainbird Software Ltd.
The HelmType: Text only Written 1984 by Simon Jay in The Quill.
Comments: Find The Helm of Immortality. All comments are of the "Strike me
with another gem of brilliance, oh most worthy one"-kind!
Seabase DeltaType: Drawn graphics Written 1985 by Peter Torrance and Colin Liddle.
Notes: Sequel to Subsunk.
SubsunkType: Bitmap graphics Written 1985 by Peter Torrance and Colin Liddle in The Quill.
Notes: Prequel to Seabase Delta.
Comments: You are trapped in a sunk submarine and have to find a way to
RunestoneType: Graphics Written 1986 by Alan Davies.
Notes: A game in which you control three characters. It used landscaping backgrounds to give a large graphical game area.
Here is a review of Runestone
ImaginationType: Drawn graphics Written 1987 by Peter Torrance.
PoltergeistType: Drawn graphics Written 1986 by Craccer Software Team (Dan B. Nielsen, Peter Lumbye).
The Wild BunchType: CHOISE/BG/DG/Bitmap graphics/Drawn graphics Written 1984 by Kevin Smith.
Here is a review of The Wild Bunch
Adventureland was created by Hans Persson and is now maintained by Stefan Meier.
If you find any errors or have information that is missing, please let me know