Recently I soloed my way through DraftCrawl (2 pages at DriveThruRPG), dungeon crawling game. The RPG system I used to play it was Goblin Quest (132 pages, same place). I used the FlexTale Solo Adventuring Toolkit (613 pages) to solo the adventure, make the adventure longer, and make the dungeon more interesting. I created ten PC goblins because they have two hit points each and the whole point of this is to watch them die. There are no rules for experience and making levels. In room one, they killed one leshy (mushroom man) and one leshy ran away. In room two, they killed one leshy and the other three retreated back down into the dungeon area when they heard the sound of an alarm bell. In room three, they found a healing potion and a scroll of summon beasts. In room four, they found a trapped door which did kill one of the goblins. The alchemist goblin turned the healing potion to acid. It was then used to weaken the lock so they could get that door open.

They found a large leshy in room five. Once again, the alchemist goblin turned the last healing potion to acid. It hit the leshy and dissolved it into a pile of goo. Room six was empty and it must be noted that several goblins had been killed in the various fights. In room seven, they saw four leshies. The goblins decided they would rather eat then fight that many opponents. They exited the dungeon and found a farmhouse. The goblin alchemist read the scroll. One of the spirit beasts killed him. The other spirit beast did scare the occupants out of the farmhouse. They raided it for food and headed to the woods for a picnic. They enjoyed their meal and started telling exaggerated tales of their adventure so far. Unfortunately, a group of human bandits found them. The goblins ran away. Some were killed, but three did survive. Give this a try! Maybe you will have better luck.