Game rental service GameFly is currently holding an under $20 October sale that includes some great deals, especially on Xbox One games, assuming you don't mind buying used copies.

Some highlights for Xbox One games include Watch Dogs for $20, Assassin's Creed IV Black Flag for $15, and Plants vs. Zombies: Garden Warfare for $18.

Check out a full list of games included in the sale below.

Xbox One

• Plants vs. Zombies: Garden Warfare -- $18
• Watch Dogs -- $20
• Thief -- $9
• FIFA 14 -- $10
• Madden NFL 25 -- $10
• Metal Gear Solid V: Ground Zeroes -- $10
• NBA 2K14 -- $10
• Assassin's Creed IV: Black Flag -- $15
• Need for Speed Rivals -- $18
• Rayman Legends -- $20
• Ryse: Son of Rome -- $18
• Just Dance 2014 -- $20
• LEGO: The Hobbit -- $20

PlayStation 4

• NBA 2K14 -- $10
• Bound by Flame -- $20
• Watch Dogs -- $20

Xbox 360

• Lightning Returns: Final Fantasy XIII -- $18
• South Park: The Stick of Truth -- $18
• Titanfall -- $18
• Thief -- $8
• Tomb Raider -- $8
• BioShock Infinite -- $9
• Metal Gear Rising: Revengeance -- $9
• Battlefield 4 -- $10
• Payday 2 -- $10
• Just Dance 2014 -- $13
• Metro: Last Light -- $13
• NASCAR 14 -- $13
• Dark Souls II -- $15
• XCOM: Enemy Within -- $15
• Sacred 3 -- $18

PlayStation 3

• Beyond: Two Souls -- $13
• WWE 2K14 -- $13
• Final Fantasy X/X-2 HD Remaster -- $20
• Thief -- $8
• Tom Clancy's Splinter Cell: Blacklist -- $9
• BioShock Infinite -- $10
• Call of Duty: Ghosts -- $10
• Dead Space 3 -- $10
• Payday 2 -- $10
• Naruto Shippuden: Ultimate Ninja Storm 3 -- $13
• Gran Turismo 6 -- $20

Shipping is free on all games, and offers are good while supplies last or until 10 a.m. PDT, October 20.

Which games are you thinking about picking up? Let us know in the comments below.