I ran my first game of XCrawl recently and found it to be a lot of fun. Here’s the play report. It’s like a kinda modern day game where dungeon crawling is the most popular professional (blood)sport.
They considered using 4e, but WotC’s cunning plan to have their license say you can’t use a modern setting with real world place names makes it impossible. As one forum poster said, “Oh well, Happy accident then. suck it WOTC” [sic].