Adventure Construction Set on the Commodore 64 is less a traditional game and more a toolkit that lets you build your own Ultima-style, tile-based RPG adventures. You use a graphical editor to lay out world maps, regions, and rooms, place creatures, items, traps, and shops, and define spells, messages, and simple game logic through menus rather than programming. Once finished, your adventure can be saved as its own disk and shared, and the package even includes a full sample scenario, Rivers of Light, plus smaller example adventures to show what’s possible. The result is a flexible but time-consuming “make your own CRPG” system that turned the C64 into a do-it-yourself adventure factory.