Yami Yugi/Atem "True" Deck Recipe
Main Deck Count: 40(always, I NEVER go over this)
Side Deck Count: 15
Extra Deck Size: 6
Spoiler: Card List (click to see content)
Monsters(31)
Alpha the Magnet Warrior x1
Beta the Magnet Warrior x1
Gamma the Magnet Warrior x1
Valkyrion the Magna Warrior x1
Queen's Knight x1
King's Knight x1
Jack's Knight x1
Electromagnetic Turtle x1
Kuriboh x1
Kuribandit x1
Watapon x1
Dark Magician x1
Dark Magician waifu x1
Berfomet x1
Gazelle the King of Mythical Beasts x1
Big Shield Gardna x1
Breaker the Magical Warrior x1
Curse of Dragonfire x1
(Swift)Gaia the Fierce Knight x1
Obnoxious Celtic Guard x1
Amulet Dragon(Extra) x1
Arcana Knight Joker(Extra) x1
Chimera the Flying Mythical Beast(Extra) x1
Dark Magician waifu the Dragon Knight(Extra) x1
Dark Paladin(Extra) x1
Gaia the Dragon Champion(Extra) x1
Archfiend of Gilfer(Side) x1
Buster Blader(Side) x1
Catapult Turtle(Side) x1
Magician's Robe(Side) x1
Skilled Dark Magician(Side) x1
Spells(17)
Dark Hole x1
Dark Magic Curtain x1
Double Spell x1
Graceful Charity x1
Magical Stone Excavation x1
Monster Reborn x1
Mystical Space Typhoon x1
Polymerization x1
Pot of Greed x1
Soul Charge x1
Swords of Revealing Light x1
The Eye of Timaeus x1
Berserker Soul(Side) x1
Brain Control(Side) x1
Card of Sanctity(Side) x1
Magical Formula(Side) x1
Soul Release(Side) x1
Traps(13)
Black Illusion x1
Dust Tornado x1
Magic Cylinder x1
Magical Hats x1
Mirror Force x1
Rope of Life x1
Spellbinding Circle x1
Zero Gravity x1
Collected Power(Side) x1
Hallowed Life Barrier(Side) x1
Relay Soul(Side) x1
Physical Double(Side) x1
Time Seal(Side) x1
It's mainly comprised of the duels he had against Weevil and Rafael(both). Though as I said, I don't have all the cards, they don't actually exist(like Spider's Web), or I just made some personal adjustments. I'm thinking about replacing Magical Formula with Horn of the Unicorn. IDK though, because it's VERY likely to get stuck drawing that, when you need to draw from your deck. Yami seemed to stop using Summoned Skull after Battle City. It's a shame, cause he'll always be a kakkoi 1 monster tribute. Guess he just started using Archfiend of Gilfer instead. I feel like the Timaeus boku no Turompuu is better than Slifer, that's why I went with the Orichalcos saga. There are a few cards that I'm not sure are on the game(or even real), but I would like to add/replace into the recipe:
Kuribabylon
The other four Kuribohs(forget their names)
Twinkle Five Star
Magical Pigeon
Underworld Circle
Brave Attack
I'll have to do some research to confirm. Though if anyone already knows, I'd appreciate any information you can share. I'm currently working on Kaiba's and Joey's. Although I don't have their legendary dragon cards yet. I do have Obelisk though, so I may just go the Battle City route for Kaiba, until I get the other legendary dragon cards. IDK what pack they come in though. Don't even remember where I got the Timaeus card. They're probably in the same pack, but I can't remember. I was actually able to win a good amount of Duelist Challenges duels with the above recipe. Though for those who know about YGO, this deck will get overpowered quick from Synchro/XYZ/Pendulum summoning. Feel free to share any suggestions or recipes you may have. I'll post more as I do more research/collect more cards.
Spoiler, click to toggle visibilty
Your cards have too much focus on Red Eyes, which restricts your gameplay a bit too much. Consider adding extra dragons to aid you, either for extra damage or for support. You don't even need to restrict yourself to dragon type, you can add any card that may give support to dragons too.
While you have good cards to send your Dragon cards to the graveyard for easy access, you don't have many alternative ways to recover them from the Graveyard. And I don't like Red Eyes Spirit, summon cards that only work for one specific monster with a name are not really that useful, as it constricts you on what you can summon (unless they have other effects attached that are really good). When you add other monster cards, it will become more useless. Return of the Red Eyes suffers from the same. Expand your horizons, there are better support trap cards for dragons. Spell Cards could have other cards too honestly, there's nothing wrong about having some card to deal with spells or traps, and you have too many cards that send monsters from the deck to the graveyard honestly.
The Extra deck leaves much to be desired too. Don't mind Number 11, though 3 of them may be a bit too much. Red-Eyes Flare Metal Dragon doesn't sound like a useful card. For Dark Rebellion, your current deck leaves much to be desired to make it possible to easily summon it, as your level 4 cards are better suited for bringing the level 7 Red Eyes (and in case you didn't know, you don't need the monsters to be dragon type). Also I don't think it's as useful as the anime portraits. And with the deck you have, I don't think you're taking full advantage for Queen Dragon Djinn.
Tl;dr your deck is not good honestly. You see, focusing a deck on Red Eyes doesn't mean there's supposed to have only Red Eyes in your deck. Red Eyes will be your main force, sure, but not your only force. Seek other cards to support them, monsters, spells, traps and extra deck. Keep in mind also that Red-Eyes is a level 7 normal monster, and normal monsters also have benefits that effect monsters can't have.