All of Konami's iPhone and iPod touch games are on sale for $.99 for an unspecified amount of time. Yes, every single one. Even the games that were formerly priced at $4.99 and above are only $.99.
Konami's iPhone and iPod touch games collection could be considered hit and miss, but there are certainly a few gems on this list.
Frogger has been priced at $.99 for a while now, but it's still worth mentioning, and the same goes for Field Prowlers Police Rush.
It's also worth mentioning that it appears these sale prices only apply to the U.S. App Store.