You’ve probably been impressed with Fluid the Druid’s recent calculations of everything from attack odds to fireball vs. cloudkill. He has inspired me to run the numbers on Appendix A from the AD&D DMG. If you followed by solo AD&D campaign, you’ll know that it suffered from a strong lack of loot. My guys just couldn’t catch a break, and I wondered if that was typical or just my own dumb luck. So I set about calculate the odds of finding loot within a random AD&D dungeon, and it led me to some deeper insights into the game.
On the surface Appendix A presents itself as a handful of tables meant to help DMs whip up a map on a slow gaming night. Once you start poking at the numbers, a picture emerges of how the rules of AD&D actually direct the flow of the game, if you actually let them do their job, anyway. Bur first, a bit of a caveat: there are a few assumptions built in here that might lead you to some different numbers.
Let’s start with the monsters. If you roll up a random encounter on Dungeon Level 1, you can’t get a dragon, a demon, or even a bugbear. You get the usual suspects: goblins, kobolds, giant rats, maybe a skeleton if the dice are feeling spicy. These are 1‑hit‑die (or less) creatures, and when you run the math using the DMG’s XP formula—base XP plus one point per hit point—you wind up with something like fifteen XP per creature. Most encounters on that table show up in small groups, so a typical fight is worth around sixty XP.
But here’s where Appendix A reveals its teeth. Monsters aren’t the point. Treasure is.
On the treasure table for Level 1, each roll averages out to roughly three hundred gold pieces in value. That’s not a guess-that’s the result of crunching the coin probabilities, the gem values, and the jewelry table, and a bit of a fudge factor for “magic items” which are a whole level of probability analysis outside the scope of this post. Ignore magic and the average is about 265gp. I added a fudge factor increasing the value to a nice round three hundred. And when a room has a monster, you roll twice. So a “monster and treasure” room clocks in at about six hundred XP from loot alone, plus the sixty XP from the monsters. Call it six‑sixty total.
Now look at the Chamber Contents table (V.G.). Sixty percent of rooms are empty. Ten percent have monsters. Fifteen percent have monsters and treasure. Five percent have treasure alone. The rest are specials and traps—fun, but not part of this calculation.
Multiply those probabilities by the XP values and you get an expected yield of about 120 XP per room on Level 1.
That’s the real engine of early D&D. It’s the slow, steady drip of treasure‑driven advancement. Kick in the door, check the corners, grab the loot, move on. Fighting is a tax you pay on the way to the good stuff.
Of course, this leads to the next question: how many rooms does it take to level up? For this analysis I took the standard four-man tactical team of fighter, magic-user, cleric, and thief. For them all to level up to second you need 7,250XP. That means about sixty rooms to level them all, but that doesn’t tell the whole story.
- The thief wants to level after ~40 rooms.
- The cleric hits 2nd around 50.
- The fighter comes online later, around the mid‑60s.
- The magic‑user is the long game—~80+ rooms to reach 2nd under this model
If you insist everyone levels together, you’re looking at roughly 80–85 rooms cleared on Level 1 for the whole party to hit 2nd level. Of them, 48-50 rooms will be empty, so that leaves 30-35 encounter rooms of various types. On average, our quartet will have earned around 2,100gp each, which is more than enough to pay training costs, living expenses, and so on. Tjhe thief will level twice, but he can afford it with a few involuntary donations from his “friends”.
And with this, we get a peek into the structure of the game. Why hire retainers? Because more bodies means more rooms cleared per delve. Why avoid unnecessary fights? Because they’re low reward and high risk. Why map carefully and retreat often? Because the treasure is what matters, and you only get XP for what you bring home.
Appendix A isn’t just a random dungeon generator. It’s a window into the original rhythm of play—one that rewards caution, curiosity, and cleverness far more than brute force. The game was always telling us what it wanted to be. We just had to listen.