I think it is probably fair to say that getting software to run on the MicroVAX I will be challenging.
The base operating system includes a simple editor and a macro assembler.
The hard disk is predominantly filled with Security Toolkit development stuff which was written in assembler and is of most interest to security specialists. There were three games disks, but the first had deteriorated badly. I was able to retrieve the Startrek game from the others.
There are several text games (including StarTrek) at:
https://www.openvmshobbyist.com/downloads.php?cat_id=3
These would need to be put on to a disk image or transferred in some other way.
There are several versions of MicroVMS available in RX50 format which is a good start. There is also a set of diagnostics available in RX50 format.
VAX C 2.3,2.4, and 2.5 is available in RX50 format. I think this could work on MicroVMS 4. It works fine:
There are a few other items in TAP format for a TK50 but i would need to be able to convert them to disks on an emulator – perhaps the Microvax II simh emulator. These tapes include BASIC (3.3), Cobol (5.2), and Fortran (4.7). I think both the BASIC and Cobol require VMS 5. The Fortran may be ok with MicroVMS 4.
I also have about 50 TK50 tapes which could contain anything. I have no means to read them. The Australian Computer Museum is set up to read these tapes, but it would be quite an exercise to archive them all and may yield not much.