Enigma: Rising Tide was created in C++ (Visual Studio). Delphi was used to create quick converter applications, working examples of functionality to be used in the game; depth charge control functionality for example.

Deep Six is primarily Delphi code. The Cybernet engine is in C++, Glen Wolfram created a DLL that wrapped their interface and exposed a C api for use within Delphi, I wrote the Delphi interfaces to it.