Believe it or not, the PlayStation brand has been around for 20 years now. To celebrate this, Sony has today discounted over 60 PlayStation, PlayStation 2, PlayStation 3, PlayStation 4, PlayStation Portable, and PlayStation Vita games as part of its PlayStation Anniversary Sale. Titles will be over 60% off for everyone and 75% off for PlayStation Plus subscribers.
Some games included in the PlayStation Anniversary Sale include: Killzone Shadow Fall for the PS4, Uncharted 2 for the PS3, Persona 4 Golden for the PSV, and Grand Theft Auto III on PS2 Classics. There are a lot more games obviously so make sure to click on the source link below for the full list of games on sale.
This sale lasts from today (when the PlayStation Store updates) to January 19th.
Source: PlayStation Blog