Microgaming had their Viper Client which you downloaded and was revolutionary back then, their whole catalogue of slots, smooth running and with tournaments and screenshots all stored (via a huge chunk of memory!) on your PC. IGT mainly appeared at big bookmaker casinos with their own Wagerworks brands under Alderney licenses, although unlike the other two they have always had significant presence in land-based cabinet games so maybe don’t devote too much effort to online productions.
These developers from the outset had a different strategy from the smaller ones you find in multi-platform casinos. If we move on to the traditional bigger developers such as IGT, Microgaming and Playtech, little has changed from last year.