Champions generally fall into certain categories based on their skills. These are also called tags and are used on the attributes space on each champion main page and Ability Details page.
These categories are copied exactly from the game client, and will be listed on each champion normal page. Note that some champions are capable of more than just the role or roles they are listed under. A champion's abilities, items they gain throughout the game, and one's ability to fulfill that duty determine what role they assume in gameplay.
- 刺客: Cons with mediocre auto-attack and defense, who specialize in killing their enemies quickly. These champions usually are physical attackers and are DPS-based(Damage per second) or are AP(ability power) burst oriented. All of them have some form of invisibility or sudden ambushing ability. They should focus on items that will increase the damage they put out over a short period of time. In fights, they play a role as sneak attackers of key targets (like the Carry or the Mage), who pick off weak enemies and carry champions at the right time. They should not be played for frontal engagements in team fights since they lack good defense compared to fighters and tanks.
- 射手: Champions with high auto-attack damage but low defense. Most carries have skills, passive or active, that scale with their stats, such as an increase in Base Damage and Attack Speed, and rely mostly on their regular attack to dish out damage. Carry champions are extremely effective late-game at "carrying" the team to victory, either by killing off key players on the enemy team or deal large damage in team fights because they have tremendous damage output, but low defense. Due to this, they are key champions and are primary targets for enemy team. As a result, they require tanky teammates like fighters and tanks for protection as they lack survivability.
- 战士 (also known as Off-tank): Champions that blend the attributes of a damager and tank, combining moderate to heavy survivability with the damage of an assassin or carry (essentially half tank, half DPS). They lack the front-loaded, destructive damage of their pure DPS counterparts, but usually have abilities which increase their damage output, making them deadlier in the early game. Fighters can build to be extremely survivable, but the key distinction between tanky fighters and true tanks is that tanks are designed to draw damage and disrupt enemies, while fighters deal damage. In a team fight, fighter champions can surrogate the role of a tank or assassin, and many have powerful fight-initiation abilities.
- 法师: Champions with powerful magic damage skills or support skills but low defense. Some are meant to deal a high amount of damage in a short period of time(burst casters/burst mages) while others usually deal damage over time. Like carry champions, they can bring their team to victory due to their ability power, but tend to fall off in the very late game. However, they require tanky teammates for protection since they lack high durability as they are capable of dishing out tremendous damage to the enemy team with their abilities. Otherwise, enemy teams can easily pick them off, especially since few mages have outstanding mobility.
- 辅助: Champions whose skills are meant to directly aid the rest of the team. They can either babysit a champion to make laning easier for them by providing healing, buffing allies, applying debuffs to the enemy team, or a combination of the above. The most common ability for a support champion is providing an ally with a shield of some kind. One of the main goals of a support is to let their lane partner farm minions for gold, as supports can buy key gold+ items to get gold for themselves, as well as controlling the map with wards, warding all key areas of the map. These champions usually rely on their skills more than their auto-attack.
- 坦克: Champions with extremely high defense, health, and crowd control abilities, but low attack damage or poor ability power scaling. Tanks are usually champions that combine high amounts of health, armor, and magic resistance. If left alone, tanks are able to absorb high amounts of damage or create disables on their foes, which make them great harassers as well. In battle, this type of champion is usually expected to start/initiate (or at least be in the front of) the team fight; soaking up damage, and helping focus certain enemies (carry and mage champions). Due to their low damage output, they must rely on their assassin, carry, fighter, and mage champions to finish the enemy off or chase them down when they initially weakened them. As a result, tanks are not expected to gain high kills but more assists. Tank champions should coordinate team fights by telling team to retreat or advance when necessary since they lead the charge. They are also meant to be a protector of the team, and must be willing to sacrifice himself/herself for vulnerable allies if necessary.
- Jungler: Champions that can easily farm monsters in the jungle at an early stage in the game and can typically take out minions waves quickly. They usually excel at taking down opponents when they can catch them off guard in lane. Some champions jungle because their lane phase isn't that strong (easily harassed, high mana dependency early on) and others are capable of both. Most fighters, assassins and tanks can take the role of jungler.
- Melee: Champions that have a melee basic attack, so they have to be very close to their target in order to do damage. They usually have more health, armor and magic resistance than ranged champions as well as heals. Most Tanks and Fighters are melee combatants although a couple of Mages are also melee.
- Pusher: Champions that can quickly kill minion waves and/or destroy turrets/inhibitors in a short amount of time. Typically, champions that destroy turrets/inhibitors have pets and/or AoE abilities and/or a high amount of attack speed.
- Ranged: Champions whose basic attack can cause damage at a distance (see range), allowing them to avoid many harmful risks and increasing their flee capability. Ranged Champions are divided into two sub-categories: Mage and Carry champions. Mages have a weak auto-attack and focus on high damage spells or support, while Carry champions tend to focus more on frequent, powerful auto-attacks.
- Recommended: Champions whose skills don't involve any complicated mechanics and playing them effectively does not require extensive knowledge of the other champions.
- Stealth: Champions that possess at least one ability that allows them to become invisible to enemies (other than when near turrets, vision wards, and enemy champions that have consumed an Oracle's Elixir). This attribute is mainly for assassin champions.
These categories aren't copied from the game. They have been discussed on the wiki and will be listed on each champion ability detail page once it is created.