Dungeons & Dragons vs Dungeons & Dustbunnies

Compare Dungeons & Dragons and Dungeons & Dustbunnies side by side. See differences in complexity, dice, genre, cost, and more.

	Dungeons & Dragons	Dungeons & Dustbunnies
Genre	Fantasy	Post-Apocalyptic, Fantasy
Play Style	Tactical, Heroic, Dungeon Crawl, Character Building, High-Fantasy, Beginner-Friendly, Classic Fantasy, Lore-Heavy, Ascending AC	Rules-Light, Comedy, Gonzo, Beginner-Friendly, One-Shot Friendly, Theater of the Mind, Improvisation, Survival
Core Mechanic	Roll d20 + modifier against a target DC (for ability checks and saving throws) or AC (for attacks). Meeting or exceeding the target succeeds. Advantage rolls 2d20 and takes the higher; disadvantage takes the lower, replacing most situational modifiers.	Decrease Dice: each character has one die, starting at d20, that serves as both their health and their resolution roll. To attempt a risky action, roll the die against the Difficulty your class assigns that skill; meeting or beating it succeeds, while a normal failure costs only the attempt. The die steps down a size (d20 → d12 → d10 → d8 → d6 → d4) whenever you roll a 1, take major damage, or voluntarily force the scale to convert a failure into an automatic success. A character whose die would drop below d4 falls Exhausted or dies; sleeping in a safe shelter resets it to d20 and consuming a sugar ration steps it back up one size.
Dice	d20	d4–d20
Complexity	Medium	Very Low
Accessibility	Very High	Very High
Runnability	High	High
License	CC BY 4.0 (SRD); core books proprietary	Proprietary
Cost	$$$	Free
Publisher	Wizards of the Coast	Castamar RPG Studio
Year	2024	2026
Best For	Groups who want heroic fantasy combining tactical grid combat with deep character-build options, scaling from one-shots up through long multi-tier campaigns.	Groups who want a quick, comedic one-shot or short campaign as thumb-sized survivors scavenging a household that has become a hostile wilderness, with a ruleset light enough to read in a few minutes before the first session.
Highlights	Advantage and disadvantage collapse most situational modifiers into one mechanic: roll a second d20 and keep the higher or lower, so play rarely stops to total small bonuses. Each of the 12 classes offers four subclasses in the 2024 Player's Handbook, letting players reshape a class's role without multiclassing. Bounded accuracy keeps proficiency bonuses small, so low-level threats stay relevant in numbers and DCs read consistently across all tiers.	The Decrease Dice mechanic collapses health and resolution into a single die, so every roll both tests the action and visibly wears the character down as the die shrinks toward d4. Forcing the scale lets a player turn any failure into a guaranteed success by stepping their die down a size, making each clutch moment a deliberate trade of long-term stamina for an immediate result. Monsters are rated by a Threat Die that attacks and spells whittle down, and several (the chitin-armored cockroach, the static-charged dustbunny) shrug off ordinary weapons until players expose a weak spot or switch to fire, water, or magic.
Considerations	High-level play (tier 3–4) introduces significant spell interaction complexity and encounter balancing challenges for GMs. No official rules for non-fantasy genres. Three core books at $50 each represent a significant investment for the full rules.	Combat has no initiative or turn order (the GM narrates enemy intent and players react with defensive rolls), so there is little structure for tactical positioning. Rolling a 1 on any skill check (including routine Stealth, Alertness, or social rolls) steps the die down the same as taking a hit in combat, so avoiding unnecessary rolls becomes a survival strategy rather than a purely narrative choice. There is no advancement system: skills are fixed at character creation and the Decrease Die only ever recovers to its starting size, so characters do not grow mechanically over a campaign.