iOS game publisher Codito is having a sale on their games right now. Not sure how long it'll last.

The list includes:

• Tigris & Euphrates
• Tikal
• Ra
• Le Havre
• Brief History of the World
• Medici

Remember, even if you don't have an iOS device now, you can still buy these, and then when you do get one in the future...BAM! They're ready to download.