/// Your Private Retro Game Vault

Your CollectionImmortalized

Upload your legally owned ROMs.
We'll handle the saves, manuals, and maps — across every device you own.

20+ Systems
Private & Encrypted
No Ads, No Tracking
Input Support:
XBOXPS58BITDOKEYBOARD
Your Games. Your Saves. Your Legacy. /// No Piracy. Just Preservation. /// Sync Across Devices. /// Your Games. Your Saves. Your Legacy. /// No Piracy. Just Preservation. /// Sync Across Devices. ///

Everything Your ROMs Deserve

Your ROMs deserve more than a forgotten folder. Upload to Koin and we'll turn them into a playable, synced, and organized library.

roms.zip

Smart Import

Drop any ROM file — zipped, compressed, or disc image — and we'll sort it out.
No renaming. No folder juggling. Supports .zip .7z .iso and 20+ ROM formats.

Cloud Sync

Start on your Mac, finish on your iPhone.
Seamless Handoff

SCORE: 0500LIVES: 2
SYSTEM ACTIVE

Enhanced Play

Made a mistake? Rewind time. Want a boost? Apply cheats. Every session earns RetroAchievements.

MacOS
Mobile
System Ready

Start on Mac Finish on iPhone

The Metadata Magic

You upload the mess. We curate the museum.

Super Mario World
SNES
Sonic 3
GEN
Metroid Fusion
GBA
Zelda: ALttP
SNES
Street Fighter II
ARC
Chrono Trigger
SNES
Pokemon Emerald
GBA
Castlevania
NES
AFTER: THE MUSEUM
/var/www/uploads/pending/
smw_usa_v1.0.sfc120KB
sonic3_and_knuckles.gen502KB
metroid_fusion_usa.gba884KB
legend_of_zelda_link_to_past.smc1266KB
sf2_world_warrior.zip1648KB
chrono_trigger_u.sfc2030KB
pokemon_emerald_trashman.gba2412KB
castlevania_nes.nes2794KB
ff6_eng_patched.sfc3176KB
doom_32x.32x3558KB
mario_kart_64.n643940KB
goldeneye.n64322KB
BEFORE: THE MESS

Supported Systems

CONTROLLER
A
JUMP / CONFIRM
B
FIRE / CANCEL
SELECT
OPEN MAP
Keep this manual safe!
AG-1992

RETRO
SAGA

INSTRUCTION BOOKLET
PUBLISHER: KOINPRINTED IN JAPAN

The Lost Art of
The Manual

Remember flipping through the booklet on the ride home?
Koin isn't just a player; it's a preservationist. We automatically fetch high-res scans of original manuals and maps for every game in your library.

Nintendo (NES)
Super Nintendo (SNES)
Nintendo 64
Game Boy
Game Boy Color
Game Boy Advance
Nintendo DS
Virtual Boy
Sega Saturn
Sega Genesis
Sega Master System
Sega Game Gear
PlayStation
PC Engine / TurboGrafx-16
Neo Geo
Neo Geo Pocket
Neo Geo Pocket Color
Atari Lynx
Atari 5200
Atari 2600
Atari 7800
WonderSwan
WonderSwan Color
Arcade (FBNeo)
Commodore 64

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