Sega has reduced Sonic The Hedgehog games across the App Store today.
100 per cent of profits from the sale will be donated to Red Cross disaster relief efforts in Japan.
The sale lasts until the 20th of March, and sees the following titles reduced:
Sonic The Hedgehog - £1.19 / $1.99 / €1.59
Sonic The Hedgehog 2 - £1.79 / $2.99 / €2.39
Sonic Spinball - 59p / 99c / €0.79
Sonic The Hedgehog 4: Episode I - £2.39 / $3.99 / €2.99