Rampage source code for C64 Computer (c)Michael J Archer
Don't remember much about this except was helped by an old friend David Wainwright, and also David Jolliff. Rampage had large sprites, and few people at the time really could work out how it is done. Started on 21st May 1987 most of it completed in house sleeping on a floor for a few weeks!
Some of Michaels notes in other repos say his work was developed using PDS development system. https://www.cpcwiki.eu/index.php/PDS_development_system