I play a lot of EXAPUNKS, so here's a list of puzzles I made!
A register requests files. Perform a lookup of this file in a directory file and bring it to the UPLOAD host. Then write any value to #DONE.
Registers give numbers and an operation to perform. Perform this operation on said numbers and save result to RAM after finding specified allocation.
Brute-force a code by entering it one digit at a time into #PASS, then perform a lookup of the requested file in a directory file and bring it to your host.
A trash file contains two host IDs. Writing either into #AUTH will unlock a link to that host. One of the hosts, unlockable this way, will have a file with the ID 200. That file ends with an 8-digit code. Copy that code and save it to a file in your host.
Modify a file, whose ID is specified in another file, to have a more convenient departure time.