Man, I love everything about Game Dev Story
-- from the excellent premise to the cute, pixelated aesthetic to the great simulation gameplay. The idea is that you run your own game studio, and that idea is executed flawlessly. You hire your staff, choose a game genre (or do some contract work if you need extra cash), and then build up your game in terms of fun, graphics, sound, and gameplay, all while trying to keep your staff paid and avoid bugs when possible. Finally, you ship out your game and hope the reviews come back well, even while you're planning out your next title.
It's incredible fun, and the great chiptunes and graphics bring a lot to the table. There's a wild sense of humor in the mix here, too. New consoles are released into the market, a video game magazine comes every month, and you slowly build up your own studio's fanbase.
Game Dev Story is a ton of fun! It's somewhat pricey at US$3.99, but honestly, if you're a fan of the game industry at all (there's even a fake E3 where you can promote your games!), you'll find a lot of joy in this one. It's a very, very cool title.