00Hatch
A quick game design doc · v0.2 · 14 Oct 2026

DragonHatchery

Collect, raise and trade fantasy creatures. Real dragons and mythical sea beasts, not normal animals with wings.

Scroll to hatch
1The idea

Buy eggs. Hatch dragons. Feed them until they are huge. Every creature makes money every second. Rare ones get traded and shown off. If nobody can flex, nobody cares.

2Why this genre

Collect games are
the biggest thing on Roblox.

3Core loop
0 coins per second
4Creatures and rarity

Crazier look = rarer creature.

5Money goes big

Thousands. Millions. Billions.

0
6Your area

Two display blocks.
Everyone sees them.

Every player owns an area. In front of it stand 2 display blocks. A display block shows your best creature at 4× size. Block 1 is free. Block 2 costs real money.

4× size on display
YOUR AREA
Display block 1 · free
Locked · R$
Display block 2 · paid
7Food shop

New stock
every 5 minutes.

5:00
FoodGrowthPriceChance
Normal+1 size5KAlways
Rare+5 size2.5M~20%
Mythic+15 size900M~3%
8Eggs and odds

Hold it,
or hatch it?

Eggs can be traded unopened. The chat's idea: 50% super rare, 50% normal. Scroll and watch 100 eggs hatch both ways.

Chat idea: 50 / 50
Half of all eggs are super rare.
Suggested odds
45 common · 25 uncommon · 22 rare · 7 epic · 1 legendary
Blunt note. With 50/50, everyone owns a super rare within days, and nobody wants to trade for them. Keep the mystery egg, but with real odds.
9Auto-buy R$ unlock

Go AFK.
The game buys for you.

Eggs roll past in the egg shop. Pick which rarities you want. When a match passes, auto-buy grabs it. Unlocked with real money. It never spends below a "keep at least" limit.

Bought while AFK
0 eggs
10Safe trading

A trade window.
Never a "give" button.

You ✓

Friend ✓

3
2
1
Swapped by the server, at the same time. No scams.

Must-have safety

Trades run on the server. Items locked. No dupes.
Any change resets both accepts.
Rarity, size and value shown on every item.
Trade history, block button, minimum play time.
11Server events

Something happens
every 30–60 minutes.

0minutes

A wild dragon lands and the server feeds it together. A sea storm drops eggs. A boss egg must be cracked open.

Top helpers get a rare egg with a 25% legendary chance. Everyone who joins gets something.

12Offline and AFK

Sit here.
Earn double.

A rest area with chairs. Sit and go AFK: 2× coins every second. Players stay in the game to AFK instead of leaving. Offline: free 5-hour cap reset by daily login, or a cheap 3-week Offline Pass.

AFK in their own area · 1×
0
Sitting in the rest zone · 2×
z2×
0
Blunt note. Roblox disconnects idle players after about 20 minutes. Test early how a long AFK session survives that. AFK players also fill server slots, so leave room for active players.
13Real money

What players
pay Robux for.

Display block 2A second giant display in front of your area.
Auto-buyBuys the egg rarities you pick while you AFK.
Offline PassBigger offline cap for 3 weeks. Cheap.
Premium eggsBetter odds. Odds always shown.
Food bundlesRare food and shop refresh skips.
More slotsExtra creature and trade slots.
Blunt note. Paid random eggs for kids are loot boxes. Roblox requires showing the odds, and some countries restrict them. Show odds from day one.
14Reality check

"No one did dragons."

15First build

Build this first.

Now

Buy egg, hatch, place creature
Feed, size, coins per second
Short numbers: K, M, B, T
Player areas + display block 1
Food shop, 5-minute restock
Safe trade window
Rest zone (2× AFK)

Later

Server events
Mythical sea creatures
Legendary + Mythical tiers
Display block 2 + auto-buy
Offline Pass + premium eggs
Leaderboards
16Risks

Fix these
before building.

HIGH
50% super-rare eggsRare creatures flood the game. Trade value dies.
HIGH
Loot boxes for kidsShow odds on every paid egg.
HIGH
Scams and dupesServer-side trades, locked items.
MEDIUM
AFK kick, full serversIdle kick after ~20 min. AFK players take slots.
MEDIUM
Game plays itselfAuto-buy + rest zone. Events must pull players back.
HIGH
The genre fades fastSteal a Brainrot fell from 25M to ~119K players. Plan updates and events from day one.
MEDIUM
Blinding effectsThe thing the chat mocks. Keep it readable on phones.
Open questions. Is it Roblox? Can creatures fight, or only earn and show off? Where do players show off: own area, shared plaza, or both?