The rules are simple:
You may only use whatever gear can be scavenged in Concordia, or bought from Concordia vendors with money found in Concordia. Specifically:
1.) Items found in small cardboard boxes, safe boxes, lockers, dumpsters, or other common loot sources on the Concordia map.
2.) Items bought from vendors in Concordia, with money found in the loot sources listed in 1.) above.
3.) Items obtained from the Grinder, when feeding it ONLY those items found in loot sources in 1.) above.
1.) Quest rewards obtained in Concordia
2.) Items from Moxxi’s chest in the Up Over Bar
3.) Items obtained from slot machines in the Up Over Bar
4.) Items stored in the Bank
5.) Items stored in the Customs locker
6.) Items from the golden chest in Concordia
1.) Ammo is unlimited, as it is not reasonably practicable to dispose of one’s on-hand ammo, and it is easily looted in the world.
2.) Items and money obtained anywhere outside the above-listed sources MAY NOT be used in the challenge, but may remain in a character’s inventory until such time as they may be sold or stashed.
3.) No quests may be turned-in for reward during the challenge.
4.) MoxxTails from the Up Over bar MAY be purchased and used, so long as they are purchased only with moonstones found by the above rules in Concordia.
5.) As always, BAR OFF.
6.) ALL ITEM ACQUISITION must take place in a single run. That is, it is not allowed to save/quit/continue, and then to continue collecting and/or grinding loot from previous iterations, until one has successfully acquired valuable enough loot. It’s like this. You pick your toon. You start the game. If not there already, you go to Concordia. You loot whatever you can there, within the above rules. Grind whatever you care to grind. Buy/sell. Equip your challenge-eligible gear. Go get 'em, Tiger!
The challenge? It should be obvious. Equip your toon by the above rules, then fight your way to a boss with ONLY that equipment, and come back here to recount the awesome.
Preferably, we’ll see video starting out with the character’s clean inventory, walking through picking-up loot throughout Concordia, and then fighting to and killing whatever boss. Failing that, at least throw up some screenies of the highlights.
The point is to show us your mad skillz. Typically, you’ll find a few white-rarity items around Concordia, and usually enough of at least one type to be ground together for a green. Most often, we’re talking about shields and pistols, though I regularly find ARs, SRs, and SMGs, as well. COMs are pretty rare, but the occasional grenade mod does turn up in a locker. STILL, a shield and a couple guns, and MAYBE a decent grenade mod, should be plenty.
Character level and game mode are entirely up to you. Selection of which boss to kill is also entirely up to you. The point, again, is to show off the skill by basically minimizing the equipment.