Another British company, they are famous for making graphic adventure games for the Atari ST, Amiga and IBM systems with excellent high-resolution graphics, and often neat gimmicks in the packaging.  The games themselves were of varied quality, with The Pawn and Guild of Thieves being by far the most well-known.  They have published a few games made by Level 9, another excellent adventure game company of the time.

Druid II: Enlightenment is an excellent two-player adventure quest game in which you and a friend (your trusty Golem servant) move about destroying monsters and casting spells in a quest to kill the big bad guy who's terrorizing the land.  This was a really fun game from what I remember.