In VideoGames, there are items, abilities, etc. that help players gain more ExperiencePoints, especially when LevelGrinding is a problem. Unlike with a RareCandy, which gives experience immediately when consumed, an ExperienceBooster multiplies the amount you already gain e.g. from fighting. In most games that these appear in, experienced gamers will try to earn and equip these as soon as they can, since they can usually help raise all other stats more quickly.

Compare LeakedExperience, if it happens by default and MoneyMultiplier, which does this for loot. See also LuckStat.
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!!Examples:

* ''VideoGame/SuperMarioRPG'' has an item straight-up called the Exp. Booster. Whoever equipped it gained double EXP from each fight.
* The ''Franchise/{{Disgaea}}'' series has the Statistician specialist, which can be placed in a piece of equipment to provide as much as four times the normal experience. Couple this with the fact that you can stack as many of them in your equipment as there are spaces available for them, and it becomes possible to hit the level cap of 9999 in a few battles.
** [[VideoGame/DisgaeaHourOfDarkness The first game]] also handed out statisticians like candy, so this was pretty easy to exploit. Later games typically make them much harder to find.
* Some ''FinalFantasy'' games have an experience-modifying item.
** ''VideoGame/FinalFantasyVI'' called it the "Exp.Egg", doubling the user's experience gain.
** Certain weapons in ''VideoGame/FinalFantasyVII'' had Double (or even Triple) the rate of AP gain (which is more important than EXP in the endgame). Not to mention the literal "Exp. Plus Materia" that increased the exp. earned by anyone who equipped it (and could itself be placed in AP+ plus weapon to replicate faster and be distributed to all party members).
** Certain weapons in ''VideoGame/FinalFantasyX'' also had double AP gain.
** In ''VideoGame/FinalFantasyXII'', the Golden Amulet doubles the LP gained, and the Embroidered Tippet doubles EXP.
** ''VideoGame/FinalFantasyTactics'' has the "JP Up" ability that allows a character to gain more Job Points in battle.
** ''VideoGame/FinalFantasyV'' [[UpdatedRerelease Advance-exclusive]] jobs Cannoneer and Oracle have abilities that do this, with the Cannoneer's a more orthodox variant and the Oracle's one more in the vein of JP Up.
* The Exp. All (from ''VideoGame/PokemonRedAndBlue''/''Yellow'' only) and Exp. Share divides experience gained from battle among your party or a certain Pokémon when held respectively, and Lucky Egg, which doubles the experience gained in battle, and rarely held by [[MetalSlime Chansey]]. Traded Pokemon also get an increased experience boost.
** Pass Powers, introduced in Gen V, include increasing or decreasing experience gained by a little or a lot.
** The Macho Brace, Power Weight, Power Bracer, Power Belt, Power Lens, Power Band, and Power Anklet affect [[StatGrinding Effort Value gains after battle]], with the first doubling all, and the rest adds 4 to a particular Effort Value for each enemy beaten.
** The Exp. Share is modified in Gen VI, and now functions like the original games' Exp. All. [[GameBreaker Did we mention that in Gen VI, Exp. is no longer split between participants, so everyone that gets any Exp. from a battle gains the full amount?]]
*** Also, Gen V's Power Passes were brought forward as O-Powers... which you can now use on yourself as well as friends. Lucky Egg + Exp. Point Power Lvl 3 + Exp. Share = ''450% Experience.'' Or, enough to turn the tedious task of high-level grinding into a minor inconvenience.
* ''VideoGame/GoldenSun'': Killing a monster with the right type of Djinn gets increased experience, money, and chance of [[RandomDrops randomly dropping]] an item.
* In many Flash games where you can buy upgrades (shooters, {{Tower Defense}}s, [[RolePlayingGame RPGs]], etc.), there is often an item that gets extra experience (or money) per kill, very often the first that should be obtained.
* By giving them the proper titles, any item from ''PhantomBrave'' may become this.
* In a NewGamePlus of ''VideoGame/MassEffect2'', the entire squad received 25% more experience.
* While ''DungeonSiege'' has no experience points, items that artificially raised your skills ''and'' had you use them (like an axe that raised your melee skill) fulfilled the Experience Modifier role: having higher modified skill meant you landed more hits, and landing more hits raised the base skill value faster, and, of course, the modified skill value rose as well.
* ''WorldOfWarcraft'' has Rested EXP. When you log off in an Inn or major friendly city, you build an overlapping meter in which you get double EXP from kills until you hit that point. You wouldn't get boosted EXP from other sources (such as quests), but you wouldn't 'lose' Rested EXP in those cases either (the "rest" bar would adjust itself upward to compensate).
** Heirloom items (equipment whose stats grow with the level of the character) also have a base increase to experience.
** Certain World Holidays (the monthly Dark Moon Faire, and the yearly Brewfest, Midsummer Fire Festival, and Hallows End) have ways of gaining a buff for this. The buff does disappear when you die though.
** The Recruit-a-Friend feature gives triple experience points to both players when they are partied up and with a short distance from each other; although, only one player will receive the extra experience if they are too low of a level compared to the higher leveled player.
*** Unlike Rested EXP, heirlooms, World Holiday buffs, and RAF increase all experience earned. RAF also doesn't use or eat up any earned Rested EXP.
** Other buffs to experience include: [[http://www.wowhead.com/spell=86963/learning-by-example Learning By Example]] (10% buff to quest experience, random from the [[http://www.wowhead.com/item=62237 Adventurer's Journal]]), [[http://www.wowhead.com/spell=58045 Essence of Wintergrasp]] (10% buff to experience from mobs in Northrend or Northrend dungeons as long as your faction holds the PvP zone, Wintergrasp), [[http://www.wowhead.com/spell=130283 Enlightenment]] (20% buff to experience from quests and mobs, acquired from completing monk clas quests and dailies).
* One background in ''{{Arcanum}}'' ("Nietzsche Poster Child") increases EXP gain by 10% while giving the character a noticeable boost to critical failure rate ("That which does not kill me can only make me stronger."). Unless you are going for a PacifistRun (as diplomats don't make rolls that can critically fail, but do have limited sources of EXP, even then a permanent boost to your relevant stats, with an increase in cap, in-exchange for blows to combat ones is also a option), [[ThatOneDisadvantage it's not worth it]], [[note]]''Arcanum'' combat favors fast weapons with multiple blows over slow strong ones, making failures occur often and combined with Arcanum also using a system of getting EXP per attack instead of per kill means you get enough EXP to reach the default level cap of 50 in normal play anyways anyways[[/note]].
* In ''VideoGame/{{Persona 3}}'', there are two types of experience modifiers: Social Links and from after-battle Shuffles. The Shuffles are cards you can earn after a battle that automatically raise how much experience is earned from the battle or randomly raise a persona's stats. Social Links, the higher they are, give bonus experience when creating personae through fusion according to the corresponding Social Link/Arcana. ''VideoGame/{{Persona 4}}'' retains the Social Links but ditches the Shuffles (except to gain new personae).
** The "Growth" ability that some personae can learn (and you can fuse onto others later) acts as an effective experience multiplier, since it lets a persona gain experience and level up even when it's not in use.
* ''VideoGame/RuneScape'' has all sorts of experience boosters. [[http://runescape.wikia.com/wiki/Experience#Boosts The Runescape Wiki]] has a list.
* ''VideoGame/DungeonsAndDragonsOnline'' has the Voice of the Master or Mantle of the Worldshaper that give a 5% bonus, potions for up to a 30% bonus, Tomes of Learning for up to a 20% bonus, and Experience Shrines for up to 5%. [[UpToEleven All of these stack]].
* In ''TooHuman'', as your combo meter raises you get extra xp (max of 3% at level 3 combo meter) Runes can also be fitted into weapons and armor that also boost the amount of xp gained (stackable up to a certain amount, unsure of the cap)
* ''VideoGame/{{Aion}}'' also has rest xp as well as bonus xp that starts to show up if you are leveling too slowly
* ''VideoGame/TheWorldEndsWithYou'' has several items that do this.
* The Scripture in ''VideoGame/{{La-Mulana}}''. It's arguable whether or not the experience boost justifies its exorbitant price.
* ''FireEmblem'' has the Paragon/Elite skill, which doubles EXP gained.
** Sometimes this skill halves EXP gained, but gives more stat increases for level ups. The net effect is that it takes around as long to get their stats up, but they're in less danger of maxing out their level.
* The ''Franchise/TalesSeries'' has the Dark Seal, which multiplies EXP earned by 1.5x but increases damage taken and inflicts the Curse status ailment on the party member who has it equipped, and the Demon's Seal, which doubles EXP earned but inflicts various status effects. The latter is '''very''' useful in combination with the Yasakani Jewel, which blocks all status effects including those caused by the Demon's Seal.
* The ''InazumaEleven'' games, starting with 2, have a passive skill named "gakushuu" (study), which multiplies EXP earned by 1.5x for individual characters who have it. A select few characters come with it already learned, but for the vast majority, it'll cost you 30,000 [[HotBlooded Nekketsu]] Points to teach it to them. Like other passive skills, it also takes up one of the 6 hissatsu technique slots each player has - you can overwrite it, but if you want it back later, it'll cost you another 30,000 Nekketsu Points to re-teach the skill.
* Your mentor Kreia has this effect when she's in the party in ''KnightsOfTheOldRepublic 2''.
* In the ''Franchise/{{Castlevania}}'' series, there are items (and even soul abilities in the ''[[VideoGame/CastlevaniaChroniclesOfSorrow Sorrow]]'' games) that have this effect. They are not that useful, however - level grinding isn't as important as having good weapons, abilities, and playing the games better.
* The ''VideoGame/{{Fallout}}'' series has the Swift Learner perk, which grants a bonus of 5% (1, 2, Tactics) or 10% (3, New Vegas) to experience gained.
* ''[[{{VideoGame/Diablo}} Diablo II]]'' has experience shrines randomly scattered in some areas, which increase your experience gain from slaying monsters for as long as the shrine's blessing remains active.
** ''VideoGame/DiabloIII'' also has experience shrines, as well as experience boosts from equipment.
* ''HeroesOfMightAndMagic'' has Learning skill, which does exactly this. Its version from ''V'', Enlightenment, also gives the hero extra stat points every several levels (retroactively), becoming a major GameBreaker in long games.
* One of the possible unit upgrades in ''VideoGame/{{Civilization}} IV'' increases the experience gained in future combats.
* The ''VideoGame/SuperRobotWars'' games have the "Gain" and "Cheer" Spirit Commands, which double experience gained from one fight. Cheer can be cast on any friendly unit, but Gain only affects the caster. The most obvious use is finishing off a boss.
* In ''DarkSouls'', the Covetous Silver Serpent Ring and the Symbol of Avarice helm.
* Zilean in ''LeagueOfLegends'' acts as one of these for everyone on his team.
* In ''VideoGame/DragonQuestIX'', the [[PrestigeClass Armamentalist]]'s [[LimitBreak Coup de Grâce]] gives a random experience boost to all party members. The Elevating Shoes, meanwhile, give a 5% bonus to anyone who wears them, a small but helpful boost due to the experience system awarding ''less'' to lower level characters, something that inevitably happens with characters under jobs with steeper leveling curves.
* In ''VideoGame/OdinSphere'', you can buy a Spirit Gem from the very first merchant you encounter, after the first stage of the game. Equipping this item increases the experience that your Psypher Weapon gains when you absorb phozons. You don't need to have it equipped all of the time, so you can just swap it on whenever you're done killing a wave (or entire level) of enemies. It's also a handy part of the Phozon Farming Abuse trick, which involves using the Phozon Release skill to turn some of your "magic points" into free-floating phozons. Equip the Spirit Gem, release all of the phozons you're carrying, and then reabsorb the phozons. This restores your MP gauge (though not to the same level as before), allowing you release and reabsorb all of your phozons again and again. Doing this often will grind up your Psypher Level, especially with the Gem.
* In ''VideoGame/DungeonsOfDredmor'', Big Game Hunters have a chance to earn a bit more experience when killing enemies that are animals, and Archaeologists can get a lump sum of experience by sending enchanted items to the crate room from ''Franchise/IndianaJones''. Yeah, [[ReferenceOverdosed it's that sort of game.]]
* In ''SpiralKnights'', Heat Amplifiers temporarily double the amount of heat you earn for your gear. Activating a new one adds its duration to the current amplifier's.
* ''VideoGame/FreedroidRPG'' has "Brain stimulator" [[SocketedEquipment addon (helmet only)]] doing this.
* ''VideoGame/TheElderScrollsVSkyrim'' has two versions of this:
** The 13 Standing Stones scattered around the world each give a different mutually-exclusive permanent buff when activated. Early in the game, the Mage, Thief, and Warrior stones are easy to find and provide a 20% increase to all XP gained in their respective type of skills. The Lady Stone (which isn't that far off from the three aforementioned stones) gives you only 15%, but applies it to all your skills.
** Resting in a bed for any amount of time provides a buff to XP gain for the next 8 hours of in-game time. Any bed will make you "rested" for 5%, but a bed you own (in your home or by renting a room at an inn) will make you "well rested", for a 10% buff. The ultimate, however, is the "Lover's Comfort" buff: 15%, earned only by sleeping in the same bed as your husband or wife.
* The EXP Chance ability in the ''VideoGame/KingdomHearts'' series doubles your experience (Or more if you stack it) as long as you have critical HP. It's obviously very helpful, but it means enduring the [[CriticalAnnoyance accursed beeping]].
* ''BlueDragon'' had the Black Belt item that increased XP gain.
* In early editions of ''DungeonsAndDragons'', having a high value in the correct ability score increased earned ExperiencePoints by 10%.
** There were magic items that could increase the number of ExperiencePoints gained by the owner or permanently increase a character's level.
* In ''VideoGame/MarioAndLuigiDreamTeam'', there are both pieces of gear and badge effects that raise the amount of experience gotten for winning a battle. Oh, and one rank up bonus also makes every battle from then on give you 25% more exp as well.
* Moxxi's Endowment in ''VideoGame/{{Borderlands 2}}'' grants a tiny EXP boost in exchange for not using a relic. It is, however, of questionable usefulness, as it's boost only applies to EXP gained from kills, not from quests. By that point in the game, usually the only decent exp you can get is from either quests, or joining a friend in a much higher level game and mooching EXP from their kills.

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