GAME DESIGN DOCUMENT · QUICK DRAFT V0.1 · 14 OCT 2026
Dragon Hatchery
Collect, raise and trade fantasy creatures. Real dragons and mythical sea beasts, not normal animals with wings.
GenreCollect + idle sim
PlatformRoblox (assumed)
PlayersKids + teens
HookDragons + safe trade
Dragons are free ground
The chat says no game does real dragons. Rivals have "normal animals with wings".
Trading drives it
"If there's no trade, no one can flex. If no one can flex, no one will be interested."
Look = rarity
The crazier a creature looks, the rarer it is. Players read value at a glance.
Working title. Built from a Discord brainstorm between Epicz [GDTV] and HosTop [ZZZ].
01 · CORE LOOP
Earn, hatch, grow, earn more
Click a step. The loop never ends: better eggs give rarer creatures, and rare creatures are what players trade and show off.
02 · CREATURES AND RARITY
Six tiers. Crazier = rarer.
Common creatures are normal animals. Better eggs give more mythical creatures. Bar height shows the income multiplier. Click a tier.
Land and sky
Dragons are the star. Fire, ice, storm, crystal and shadow dragons. Each type has its own egg line.
Mythical sea
Kraken, leviathan, sea serpents, giant turtles. Asked for in the chat. A good second content drop.
Art rule. The chat mocks rivals for "stupid effects that blind you". Show rarity with shape, size and colour first. Effects second, and always readable on a phone.
03 · GROWTH AND FEEDING
Feed it. It grows. It pays.
Food raises a creature's size. Size is visible in the world, so it is part of the flex. Try it.
Tier
Size level: 10
Coins per second
10
base 1 × rarity ×1 × size 10
A big common can beat a small rare early on. A big legendary beats everything.
04 · FOOD SHOP
New stock every 5 minutes
Most food is normal. Each refresh has a chance of rare food: expensive, but much bigger growth. This is why players keep checking back.
Next refresh
5:00
Last refreshes (each square = one slot)
Food
Growth
Price
Chance
Normal
+1 size
Low
Always
Rare
+5 size
High
~20%
Mythic
+15 size
Very high
~3%
05 · EGGS AND GAMBLING
Hold it or hatch it?
Eggs can be traded unopened. An unopened egg is a gamble, and that choice keeps the trade market busy. The chat's idea: 50% super rare, 50% normal. Hatch 100 and see what that does.
Chat idea: 50 / 50
Normal 50%
Super rare 50%
Suggested odds
Common 45
Unc. 25
Rare 22
7
Blunt note. With 50/50, half of every egg is a super rare. Within days everyone owns one, and nobody wants to trade for them. Keep the mystery egg, but with real odds (1% legendary).
06 · SAFE TRADING
A trade window, not a "give" button
Like MMOs and Final Fantasy: both put items in, both press Accept, the server swaps them at the same time. "No one trusts kids." Try it: change an item and watch both accepts reset.
You
⇄
Friend
Both players: check the items, then accept.
The four steps
Request sent, other player accepts, window opens.
Both put creatures, eggs or food in.
Both press Accept. Any change resets both.
3-second countdown, then the server swaps.
Must-have safety
Server-side trades. Items locked. No dupes.
Rarity, size and value hint on every item.
Trade history and a block button.
Minimum play time before trading.
07 · SERVER EVENTS
Something happens every 30–60 minutes
Everyone on the server joins in. A wild dragon lands and players feed it together. A sea storm drops eggs to catch. A boss egg must be cracked open.
One hour on a server
Contribution
Top helper reward
A random rare egg with a 25% chance of a legendary.
Blunt note. If only the top 3 win, small kids never win and stop joining. Everyone who joins gets a small reward. Top helpers get the rare egg.
08 · OFFLINE EARNINGS AND MONEY
Creatures earn while you sleep
Free players earn for up to 5 hours offline, and the daily login resets it. A cheap Offline Pass raises the cap and lasts 3 weeks. Drag to set how long the player is away.
Away for 8 hours (example creature: 50 coins/sec)
Free · 5 h cap
Offline Pass · 12 h cap (assumed) · 3 weeks
The chat line was unclear. This reads it as: free = 5 h cap, paid = a bigger cap for 3 weeks, cheap price.
Premium eggs Higher odds, odds always shown.
Food bundles Rare food and shop refresh skips.
More slots Extra creature and trade slots.
09 · FIRST BUILD
What to build first
Ship the loop and the trade window first. Without trading there is no flex, so it is in the first build.
Build first
Buy egg, hatch, place creature
Feed, size level, coins per second
4 tiers, ~12 land creatures, 3 dragons
Food shop with 5-minute refresh
Safe trade window (server side)
Free 5-hour offline earnings
Add later
Server events every 30–60 min
Mythical sea creature family
Legendary and Mythical tiers
Offline Pass and premium eggs
Trade value hints and history
Leaderboards (richest, biggest dragon)
10 · RISKS AND OPEN QUESTIONS
Fix these before building
High
50% super-rare eggs
Rare creatures flood the game. Trade value dies. Use real odds.
High
Loot boxes for kids
Paid random eggs must show odds on Roblox. Some countries restrict them.
High
Scams and dupes
All trades on the server, items locked, value hints shown.
Medium
Blinding effects
The thing the chat mocks. Keep effects readable on phones.
Open questions for the team
Is it Roblox? Everything here assumes yes. · Can creatures fight, or only earn and be shown off? · Where do players show off: own island, shared plaza, or both?