Adventure Game Studio (1997, Chris Jones & others)

[watchful]

#4040

While not strictly a game itself this software facilitates the creation of adventure games in the style of Sierra. DOS was supported up until version 2.7.

There is a vibrant community around the tool. Some companies are still producing commercial games, though not for DOS as far as I know. The most prominent example being some recent Wadjet Eye games.

Here is a list which contains a link to the last DOS version:
https://www.adventuregamestudio.co.uk/wiki/AGS_Version_history