Chris Buffa (Modojo): Sometimes the best iPhone and iPad games are the ones you least expect, FDG Entertainment's Slayin a prime example. Billed as the first "endless action RPG," this retro throwback delivers the sort of addictive experience that'll keep players entertained for minutes or even hours a day, as we soon discovered after downloading this $0.99 title. That happened around 8:00PM at night, and before we knew what had happened, our iPads read 10:00PM. Did we stop? Heck no.