GOG.com is celebrating its fifth birthday with a High 5 Sale, offering gamers the chance to pick 5 out of 25 games for a discounted price of 80% or more. The sale will run until next Monday, September 16 at 4:00AM GMT.

The list of titles included in the offer are:

• Alan Wake
• Alan Wake’s American Nightmare
• Amnesia: The Dark Descent
• Anodyne
• Blackwell Bundle
• The Cat Lady
• Driftmoon
• Dyad
• Evoland
• Lucius
• Miasmata
• Omerta: City of Gangsters (Includes all DLC)
• The Penumbra Collection
• Primordia
• Puddle
• Shattered Haven
• Signal Ops
• Slender: The Arrival
• Stacking
• Strike Suit Zero
• Sword of the Stars: The Pit
• Tiny and Big: Grandpa’s Leftovers
• Torchlight
• Waking Mars
• Zafehouse: Diaries

The High 5 Sale is the first offer planned for the coming weeks. Each week will feature a mix of contests, promos, gifts and specials. System Shock 2 is available for $2.49 for 24 hours as a preview of what to expect.