In April 1975, Ken St. Andre borrowed a 1st edition Dungeons & Dragons set from a friend. He found that he liked the concept but disliked the miniature wargame style of play, the use of polyhedral dice, alignments and clerics. He decided to write his own rules set and play the game with that instead. After two months of playing the game with his friends and rewriting it based on experience, he printed the forty-page 1st edition rules book in a first run of one hundred copiesnote .
Up to the beginning of the 1980s, T & T enjoyed moderate success, reaching its classic 5th edition in 1979. Then competition from a large number of new games, as well as significant rewrites of older games like D & D, pushed it into obscurity. According to The Other Wiki, in 1999 Pyramid magazine named Tunnels & Trolls as one of The Millennium's Most Underrated Games. It still has its loyal followers in many countries, though, with Japan still publishing an official magazine for it (for example). In 2005 a 30th Anniversary Edition (aka 7th edition) was published with modernized rules.
Tunnels & Trolls uses only six-sided dice for game mechanics, and the principle of simplicity and uniformity permeates the rules. Compared to the infamously convoluted and cryptic 1st ed Dungeons & Dragons rules, the Tunnels & Trolls rules were clearly laid out and well-explained. T & T was also less serious-minded than D & D: the tone was lighter, gameplay was oriented towards having fun, the spell names are mostly cute or punny, or both. However, the game is not joke-oriented as a whole — it is a sound RPG.
Some of the significant innovations of T & T were:
- Armor reducing damage, not probability of hitting.
- Spell points instead of a Vancian Magic system.
- Attribute-based saving rolls
- The solo adventure format
This game provides examples of:
- An Adventurer Is You
- Cast From Stamina: Casting spells drains a magic user's Strength. Later editions avert this with a separate Wizardry stat.
- Character Alignment: Emphatically averted.
- Character Customization
- Character Level: In editions up to 5th.
- Combat Medic: Healing (properly Poor Baby) is a wizard spell.
- Damage Reduction
- Dungeon Crawling
- Experience Points
- Early Installment Weirdness: The oldest editions have some quirks.
- The Rogue class was capped at 7th level, after reaching it that character had to change class to either 5th level Warrior (losing any and all spellcasting abilities) or 3rd level Wizard (greatly reducing combat ability, but retaining all his learned spells).note
- Instead of reducing received damage per combat round, armor counted as a bonus to Constitution stat. Player would decide how much damage was absorbed by breakable armor.
- Ranged attacks were always accurate on their own, if they were possible to be made. Targets would instead evade them completely by making saving throws.
- Fighter, Mage, Thief: Almost, but not quite. There are the types Warrior, Wizard, and Rogue (and Warrior-Wizard), but they're not classic classes and the Rogue is not a Thief but a free-lancing Wizard.
- Five Races: Except it's six: there are two Fairy racesnote , actual Fairies and Leprechauns.
- Game-Breaker: In earlier editions, there was a spell allowing to permanently triple any given weapon effectiveness. A single Wizard could enchant all of his party weaponry during a Time Skip. Later nerfed by making the effect temporary.
- Game Master
- Gender Is No Object: at least since the 4th editionnote , and likely earlier, the rules have completely avoided gender discriminationnote . Female warriors are common in rulesbook examples and in published adventures; the 4th edition introduction describes adventurers as "[b]rave men and women".
- Heroic R.R.O.D.: In both physical and magical varieties.
- Using a weapon without sufficient strength will temporarily drain that strength by the difference per combat round. It accumulates pretty fast. If strength is drained to 0, the character passes out, and any excessive drain is converted to actual damage - it's completely possible to tire yourself to death by trying to swing that BFS.
- Draining your Strength to 0 by spellcasting kills you.
- House Rules: Strongly and actively encouraged by the designer, and fan-submitted house rules have found their way into the official set on a number of occasions.
- Linear Warriors, Quadratic Wizards
- Loads and Loads of Rules: Averted.
- Luck Stat
- Magic Ampersand
- Magic Knight: Rogues, and especially Warrior-Wizards.
- Magic Wand: Or rather Magic Staff.
- The Magocracy
- Poison Is Corrosive: The mist in one room in the Solo Dungeon #4 Naked Doom.
- The Six Stats: Nearly; replaces Wisdom with Luck.
- Sword and Sorcerer: It's easy to make the abilities of a warrior and wizard (or rogue, which is another kind of magic user) work together.
- Tropes Are Tools: Although it started off as a Serial Numbers Filed Off version of Dungeons & Dragons, it introduced the concept of Skills which eventually made their way back into D&D, solving a long-standing problem of how to deal with things like picking locks, disarming traps, and pretty much anything else that wasn't strict wargaming. The skill system was also the basis of the skill system in Wasteland, which had a considerable impact on stat-based computer roleplaying.
- Universal System: Two spin-off games, Monsters, Monsters! and Mercenaries, Spies & Private Eyes used the same basic rules.
- Vancian Magic: (Mostly) averted. T & T has spells arranged into power levels, but capacity is governed by spell points.