I was hired to implement a CRM for an insurance company to replace their current system.
Of course no documentation or functional requirements where provided, so part of the task was to reverse engineer the current CRM.
After a couple of hours trying to find some type of backend code on the server, I discovered the bizarre truth: every bit of business logic was implemented in Stored Procedures and Triggers on a MSSQL database. There were no frontend code either on the server, users have some ActiveX controls installed locally that accessed the DB.
There was no version control at all. The company that provided the software was really shady, and the implementation was so bad that the (only) developer was there full time fixing the code and data directly in production when the users had any issue (which was several times a day).