Masteries

Offense:

• Sorcery: Pretty obvious, you don't want attack speed or increased minion damage. I would also say every form of CDR is better than the 5 AD and AP while Ignite is on cooldown.
• Deadliness : More AD is definitly better than more AP, also unlocks Weapon Expertise
• Weapon Expertise : Builds nicely out of Deadliness and gives even more armorpen, what more can you want?

Defense:

• Durability : I would say, HP/lvl is best here. HP regen on low levels of HP is not that great, because you should stay at high hp nearly everytime. Builds also into Veteran's Scars . why not Tough Skin seems to be obvious.
• Hardiness : Armor helps you at toplane against minion damage and physical damage champions.
• Resistance : A good amount of resistances for earlygame? Why not.
• Veteran's Scars : ist the best mastery in T3 to get, flat health early is godlike.
• Unyielding : Because earlygame you will trade very much, this will help you to mitigate damage, especially damage over time.
• Relentless : Effectivity of slows reduced, definitly something good to have.
• Block : Again, many auto attacks will be done top and this will reduce the damage from all of the enemy.
• Tenacious : This is why we don't need Mercury's Treads.
• Legendary Armor : If you calculate it for EHP-Increase, this mastery totall sucks. Earlygame you will have not enough resistances so it is ****. Lategame you wil have so much resistances that it doesn't do anything aswell.
• Reinforced Armor : Critting ad-carries are your biggest enemy's lategame, so get this.
• Honor Guard : No longer a **** mastery, 3% dmg reduction with 1 point is great.

Runes

• Greater Quintessence of Attack Damage: AD to increase the power of your 2 damage spells and the auto attacks. Makes last hitting way easier. If you know the enemy starts with a full armor runepage and Cloth Armor, it could be also good to use greater quintessence of desolation.
  
• Greater Mark of Attack Damage: The reason why I take now AD over Armorpen is, that Black Cleaver, Youmuu's Ghostblade and Weapon Expertise now give enough armorpen even early. So we can abuses this and take more AD.
  
• Greater Glyph of Scaling Magic Resist: Scaling runes are way better than flat if you face a physical damage top laner. Also, they scale really well with Courage.
  
• Greater Seal of Armor: Standard runes for nearly any champ that isn't mana heavy. Helps to block damage from all auto attacks, reduce the damage of minions and make enemies with phyiscal damage spells deal way less damage early. Also with Courage it is even better.

Situational:

• greater quintessence of desolation/ greater mark of desolation: It was changed, how armorpen is now applied. Flat penetration is now applied after percentage penetration. This means, this runes will stay effective through the whole game. I calculated that you will reduce a 200 Armor opponent with Last Whisper, Black Cleaver(4 stacks), Youmuu's Ghostblade, masteries and this runes to 25 Armor. Means, you deal epic amounts of damage to tanks. This way you can become one of the best tank shredders of the game. But of course, our targets are carries and against them it doesn't make that much sence.
  
• Greater Glyph of Magic Resist: The only reason to get this would be someone like Rumble, Teemo or Kennen top lane, which you would loose most of the time anyway.

Ability Explanation

• Perseverance: Since the buffs that it no longer gets stopped by minions it is way better to keep high hp. Just don't let yourself get poked down by the enemy and you get free sustain.
  
• Decisive Strike (Q): Earlygame one of the best spells to harass the enemy. It deals good amounts of damage and the speed buff is nice aswell. But the greatest thing about it is the silence, which shuts down most enemies. Also, don't forget, on activation this one removes all slows on you.
  
• Courage (W): What an OP ability for a non-ultimate ability. This is basically a spammable mini alistar ult which gives you even more resistances aswell. This is why we don't need that much tank items. It also reduces the cc of the enemy, so we don't need Mercury's Treads aswell.
  
• Judgment (E): Ah, our well known signature move. The change to it was a huge buff. Yeah, the slow while moving through enemies and that it no longer removes slows is bad, but for that, it deals way more damage, especially to minions. He can now easily clear waves. And not many people can trade with Garen while he uses this.
  
• Demacian Justice (R): And this is our finisher move. This makes you really scary, because if the enemy gets low on HP, he is instantly dead. Especially with Ignite, you can kill many people with ease or at least scare them away. But note that it only deals magic damage, no true dmg (damn you riot). This way it can be countered by MR, a simple Black Shield or Poppy's passive. Generally shields and heals counter this ability hard.

Items

Item Sequence

Ionian Boots of Lucidity 900

Black Cleaver 3000

Youmuu's Ghostblade 2800

Infinity Edge 3450

Guardian Angel 3200

Mercurial Scimitar 3200

Start items

• : Nothing helps Garen more in the earlygame to harass the enemy than Boots. With this, you will have a great MS-advantage over your enemy if you use Decisive Strike, so you can easily hit the enemy. Also, 3 or even 4 Health Potion's are great for sustain if your Perseverance isn't enough.
  S3 Update: Boots have been made weaker, so you can start with different items if you want, but boots are still best.
  
• : If you face ad-heavy champs top lane which can cause problems like Lee Sin, Renekton, Riven, Darius, Garen, etc., use this item to be resistant against their aggression. If they foolishly started with Boots, you can outtrade them, if they try to harass you.
  S3 Update: Even a better choise now because boots got nerfed.

Preferred Items

• : Garen needs very much gold to get very effective. For this, you need a G/10. Crit is a great stat on Garen because he can proc it often even without high critchance. Decisive Strike can crit, all 6 hits of Judgment can crit and his basic attacks can crit aswell. They also increase Garen's damage effectively.
  S3 Update: A bit lower crit, but for that, last hitting gives now more gold. Definitly better than before. Also in S3 every champ gets less gold, making a g/10 much better.
  
• : I think one of the most unorthodox items of my build. It is pretty simple why I have them here. As I explained through the guide, Garen's Courage offers enough cc-reduction and Mercury's Treads scale rather meh with it. This allows Garen to basically build any boots he wants. This are the optimal boots for Garen for winning the lane because CDR is very important. More Decisive Strike, more Judgment, more Courage, more Demacian Justice. Since all your spells cost nothing, you basically can spam the enemy to death.
  S3 Update: The only upgrade I would consider is Enchantment: Alacrity, because it fits Garen most.
  
• : Just look at the most important stats for Garen: AD, Armorpen, CDR, Crit and MS. This item offers 3 of them without any drawback. Get it, it is just overally great. I get this after Avarice Blade and upgraded boots, because for me the G/10 and MS is more important than the increased damaga, cuz Garen needs the gold to scale into lategame and needs the MS to catch the enemy in lane. Also, 30% CDR on Garen near lvl 9 is just the most ridiculous thing ever...
  S3 Update: This item now also builds into remade Black Cleaver. Because of that, you have to get a second one after you upgraded the first one.
  
• : BEST ITEM FOR GAREN S3. Period. If you don't get this, better go back to playing tetris.
  
• : I don't want to instantly finish Youmuu's Ghostblade after I got Avarice Blade and The Brutalizer. This way, I can generate way more gold and this helps me to scale into lategame. But at lvl 18 I want to have it, because the active is really nice to have for lategame teamfights. MS is great to catch up to carries and AS is great if Judgment is on cooldown. Also, having all stats you need in 1 item without waisting much gold is, I would say, broken.
  
• : People say the best item for Garen, and they are right. If you don't buy this, you can also go back to super mario. This is the source of most of Garen's damage. I don't rush it because earlygame you need gp10, CDR and HP to do well. But later in the game you will feel that your damage will go down a bit and you can easily solve it with this item.
  S3 Update: After some more testings at PBE, I just how to say wow, how much damage he deals even without Infinity Edge. So it is totally possible to replace this with Frozen Mallet, still deal great damage and be way more tanky.
  
• : The best defensive item in the game, no matter what. The resistances are just godlike, especially on Garen with his Courage. If started with Ninja Tabi, you can also go for this item directly after Avarice Blade to even further shut the enemy ad down. This way, nobody can deal with you in lane because you got endgame resistances at lvl 10, much like Singed while he ults. And you can even increase that with the Courage active. Normally, I don't get it early, because again, more important items and stats to get.
  S3 Update: Got some small nerfs but is still manadtory on Garen.
  
• : This is a new item ooming from S3. As active, it works like Quicksilver Sash but adds a 1 second speed boost on top of it. It also gives nices MR and AD. Definitly nice to have over Maw of Malmortius

Situational Items

• : These items are optional to build. If you can't get any other item listed down here at once, while you have over 475 gold at base, buy a Doran's Blade. It is never a wrong buy to make your laning phase stronger, but other items are more important. Note that these should only be bought in the first 15 minutes of the game, otherwise they will just slow your damage growth down.
  What to replace: None, just get it early.
  
• : While many boots can be great on Garen, I think this and CDR are the most important ones. Sure, you can go roam with Mobility Boots or avoid even more cc with Mercury's Treads, but this isn't as important as the other boots. You everytime buy Ninja Tabi if you start with Cloth Armor and that's basically it. This way, you can shut your enemy down even further.
  S3 Update: I wouldn't upgrade them, because later I switch them with Ionian Boots of Lucidity anyway.
  What to replace: Ionian Boots of Lucidity
  
• : These boots with the new changes are definitly now usefull. Garen loves movement speed and especially slow reduction helps him. But if you want to get them, you have to combine Black Cleaver, Youmuu's Ghostblade and Spirit Visage, which isn't actually a that bad build. Seems to be again your decision here.
  What to replace: Ionian Boots of Lucidity
  
• / : This item and Mercurial Scimitar battle for the the top of the MR items. What this item gives you instead of Mercurial is more AD early with Hexdrinker instead of Quicksilver Sash and more AD later with the passive. But for that, less flat resistances. Of course, the magic damage shield is nice, but it is your preference what to choose.
  What to replace: Mercurial Scimitar
  
• : Your counter against true dmg. This item helps you if you face someone like Olaf, Darius or Cho'Gath. Get it after Avarice Blade.
  What to replace: Mercurial Scimitar, Infinity Edge
  
• : "This guide has an item with AP and mana regen in it, must downvote." Wait, wait wait. Did you actually look at this item before you voted? Yeah, it offers AP and mana regen, that is nice that you know that. But it also offers 20% Spellvamp and 10$% CDR. HOW AWESOME IS THAT!!! It can be a great replacement for Youmuu's Ghostblade if you don't like it at all. I don't know which I would prefer atm, so, it is up to you.
  What to replace: Youmuu's Ghostblade
  
• : Due to the fact that % Penetration is now applied before flat penetration, getting Last Whisper and Black Cleaver viable. I would replace the MR item for it, but that would make you even more squishy.
  What to replace: Mercurial Scimitar, Infinity Edge
  
• : Another option for people which dislike Youmuu's Ghostblade. In this build Spirit Visage would replace Mercurial Scimitar with an early Kindlegem, while Infinity Edge takes the place of Youmuu's Ghostblade. Of course, this build would have Frozen Mallet in it, giving you even more HP, making you basically off-tank Garen.
  What to replace: Mercurial Scimitar, Youmuu's Ghostblade

TROLOLOLOLOL BUILD

Garen

Item Sequence

Enchantment: Alacrity 450

Black Cleaver 3000

Black Cleaver 3000

Sword of the Divine 2200

Black Cleaver 3000

Black Cleaver 3000

How to build a team around Garen

Garen

• A tanky initiator jungler like Nautilus, Rammus, Maokai, Amumu, Singed, Skarner.
  • Again, Garen is no tank. He has no real way to initate fights and while he can stand against much, he can't stand against the fronloaded burst. Wait until he initates and do your job.
• Very much CC
  • To play Garen best, you need people to hold the enemy in place. Some perfect choises for this would be Morgana mid, Nautilus jungle and Alistar support. They can keep the enemy in place so you can spin directly through their heart. Another great partner is Galio, he taunts anyone into your Judgment. Combine that with a Jarvan IV jungle, Lux support and unleash DEMACIAAA!!!
• Will of the Ancients
  • Will of the Ancients is a bad item on Garen, but if a teammate gets it, then you can prefer from the aura, because Judgment and Demacian Justice proc on spellvamp. Demacian Justice can easily deal 1000 damage lategame, which will heal you for 200 HP. And Judgment heals for every target it hits for 1 second by 67 HP, means if you hit 5 champs for the full duration you heal yourself by 1005 HP!
    
    If you now ge Spirit of the Spectral Wraith and combine it with this aura, well, you know what happens.