Yu-Gi-Oh! formats decide three things: which cards are legal, how many copies of each you can play, and which rules the duel runs on. YGO Omega runs all of them in the same client, so you can play today's TCG list in one duel and the 2005 GOAT format in the next without installing anything else.
Only two formats have ranked ladders: TCG and Genesys. The others are open for casual duels, manual play and tournaments.
Yu-Gi-Oh! formats at a glance
| Format | What it is | Ranked |
|---|---|---|
| TCG | Konami's current TCG list and card text | Yes |
| OCG | The Japanese list, card pool and rulings | No |
| WCS | Konami's World Championship list | No |
| Genesys | Points instead of copy limits, no Pendulum or Link monsters | Yes |
| GOAT | The 2005 format, with pre-errata card text | No |
| Edison | The 2010 format, on old rules and old text | No |
