For some reason, it's common for badges to be depicted as either giving special abilities to or augmenting the special abilities of the wearer. This could be rooted in the fact that military officers and the like wear them as symbols of authority. Authority is by no means necessary to use these babies, however.
This trope is common in RPGs, where they will be collected as equipment.
Subtrope of Clothes Make the Superman.
Has nothing to do with using sewing needles, tacks, pushpins, or the like as weapons. Also has nothing to do with The Pen Is Mightier.
- In Bleach, Ichigo has a badge that can, among other things, detach his soul from his body.
- In Sailor Moon, the main character has a brooch which serves as both a Transformation Trinket and a holder for her Power Crystal. Chibi-Chibi also gets one later on.
- In GoLion / Voltron, the keys to the lions hide themselves as pins.
- In the western-created Voltron Force, the keys are required to activate Voltcoms.
- E.E. "Doc" Smith's Lensman series. The Lens, which is the badge of the Lensmen of the Galactic Patrol, gives the wearer a variety of useful mental powers, including language translation. It will also kill anyone who touches it other than its owner.
- Dungeons & Dragons has a handful of magical pins/periapts/scarabs/brooches, starting with 'brooch of shielding' which protects against Magic Missile and 'scarab of protection' which before D&D3 gave a saving throw against spells normally not allowing it, in later versions gives spell resistance and absorbs a number of lifeforce-draining or death attacks.
- Hollow Knight: Called "charms" their function is largely the same. Only a certain amount can be equipped at a time, upgrade to be able to wear more charms. The whole deal.
- In EarthBound (and the other Mother games), one of the earliest really useful special items you get is the Franklin Badge, which reflects electrical attacks. It should be noted that in MOTHER1, the Franklin Badge only reflected PK Beam Gamma, which was a one hit KO.
- In Final Fantasy Tactics Advance, certain characters wear a ribbon (the military style, with a badge) that makes them exempt from all laws.
- In the Mario RPGs, badges affect stats and sometimes have more interesting effects:
- In Paper Mario and its sequel, they are Mario's sole form of equipment, and do anything from giving the player extra information, to giving Mario extra moves, to giving already existing functions more effectiveness, to boosting Mario's stats when low on health. They're stat-boosting accessories in Mario & Luigi: Superstar Saga and Mario & Luigi: Partners in Time.
- In contrast, Mario & Luigi: Bowser's Inside Story and Mario & Luigi: Dream Team turns it into a sort of Limit Break instead where an in-battle badge meter can be filled up with successful attacks; the exact advantage given is determined by Mario's badge, while the rate and requirements for filling the meter up are determined by Luigi's badge. The effects range from healing the bros., to a defensive buff, to affecting enemies with bad status effects.
- The World Ends with You is built around this trope; every "player" in the "game" the protagonists are trapped in gains Psychic Powers from one. Neku, the Player Character, is unique in that he can use more than one (thus he can use pins in a Powers as Programs style). Oh, and the Big Bad's Evil Plan is to use modified pins to wire everyone up to a Hive Mind. Neku's power makes him the best hope the Mysterious Backer has of countering it.
- In Pokémon, badges obtained by defeating gym leaders allow the player character's traded Pokémon to listen to them instead of ignoring orders. In early games, badges permanently gave a boost to a Pokemon's stats in battle.
- In The Sims 2 expansion packs didn't add new skills (such as crafting, gardening and fishing) but used "talent badges" instead. Averted in the sequels where most of these were converted into skills.
- Many of the trinkets in World of Warcraft fall into this category, although it's hard to tell with some of them because their names are so vague.
- In the fourth and fifth installments of the Epic Battle Fantasy series, some of the stat-boosting or ability-granting pieces of flair are badges.
- Comically played with in Bionic Commando Rearmed. Two of the bosses are war veterans with such a ridiculous amount of medals pinned to their chests, that they can stoically No-Sell bullets, lasers, and rockets alike! A grenade lobbed over their heads, though...
- In Psychonauts, merit badges represent mastery in various Psychic Powers. However, in most cases, Razputin can't use the relevant techniques at all until he earns the badge, at which point he becomes an Instant Expert in their execution.