Runbow for the Nintendo Wii U is on sale in the Nintendo eShop:
Runbow ( was $14.99): $5.09
Terraria for the Nintendo Wii U and Nintendo 3DS is also on sale in the Nintendo eShop:
Terraria Wii U ( was $29.99): $23.99
Terraria 3DS ( was $19.99): $9.99