Sleight of Hand (1 speed)
Dark Journey DA1 is your classic dungeon crawl. For 3-5 characters that are levels 1-4. By classic I mean it's exactly what you want in a dungeon crawl.
The hook or premise of the adventure is that the dungeon was once home to a powerful wizard who has long since gone on a great journey. It is now populated with all kinds of humanoids and creatures.
The maps are excellently layed out and populated. Descriptions are plentiful and clorful. The inhabitants are classic monsters; orcs, goblins, skeletons, and others. In true C&C style stat blocks are simple and basic.
If your looking for an old school dungeon crawl I don't think they get much better than Dark Journey.
l've even used parts of this adventure as temples and ruins dedicated to ancient gods for my Amazing Adventures game.
DA1 could easily be used with any number of retro or classic D&D editions. Also looking over the adventure I see nothing that would not fit necely in D&D 5E with absolutely no effort.
I've had some time to think about some of the workings of ICRPG. Being a tinkerer at heart I can't help but want to come up with mat...