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I don't remember if there's a trope specifically for this.
We have Starter Equipment, which is usually the weakest as well.
Oo oo ah ahThere might be something tropable here.
Iconic Item and Iconic Outfit are at minimum closely related- Gordon Freeman's crowbar, for instance, is one of the most hallowed of Iconic Items.
Edit: I was right, and had totally forgotten about Iconic Starter Equipment
Edited by Scorpion451

In Video Games, especially RP Gs, the main characters are usually depicted, in promo material, as using gear from the beginning/early stages of the game. In the game itself, however, you usually stop using said gear relatively quickly, as they’re very weak compared to later options. Is this a trope that exists here?
Examples:
In Skyrim, the Dragonborn is almost shown in promo material to be wearing iron armor, which is a very weak set of armor you won’t use for very long.
In most Persona stuff outside of the games, if they want to show the main characters using a persona, they’ll usually default to their awakening persona, despite it being VERY QUICKLY outclassed.
Almost all art of Cloud has him using his default Buster Sword, the starting weapon for him. I haven’t played the game, but I know he gets at least. A Couple upgrades in it.