As sales of the PlayStation 4 continue to rise, many online retailers have started offering promos and discounts on PS4 games. The major ecommerce sites dole out new game sales each week to stay more aggressive than the rest. On the other hand, PS4 gamers are just happy to be on the receiving end of the competitive market.

This week, the Humble Store is retailing "Dark Souls 2: Scholar of the First Sin" for only $20. The popular vehicle-soccer game "Rocket League" can be had for less than $15, while inXile Entertainment's "Wasteland 2" costs $20.

Buying "Resident Evil: Origins Collection" at Toys R Us will get customers a free $10 gift card. Capcom's box-set contains last year's "Resident Evil HD-Remaster" and this year's "Resident Evil Zero HD-Remaster."

Dell is giving away a $15 gift card for every pre-order of "Street Fighter 5." To be eligible, interested takers must first sign up to the Dell Advantage network service.

Over at Amazon, Prime members can enjoy a 20 percent discount on all pre-ordered games. However, the discount only takes effect two weeks after the game's release.

GOG's pool of discounted games include "Bastion," "FEAR," "Tropico" and a slew of "Lego" games. Click here to skim through more titles.

Other PS4 game deals out this week include the following:

Amazon

•  Borderlands: The Handsome Collection -- $40
•  Tony Hawk's Pro Skater 5 -- $31.37
•  Mad Max -- $44
•  Guilty Gear Xrd Sign -- $37
•  Infamous: Second Son -- $27
•  The Order: 1886 -- $23
•  Fallout 4 -- $53
•  Wasteland 2: Director's Cut -- $25
•  Shovel Knight -- $21
•  Until Dawn -- $50
•  Lego Jurassic World -- $29
•  Guitar Hero Live -- $70
•  Transformers Devastation -- $30
•  DMC: Devil May Cry - Definitive Edition -- $23
•  Final Fantasy XIV: Heavensward -- $16.45
•  Need for Speed -- $40
•  Uncharted: The Nathan Drake Collection -- $34
•  Lego Dimensions -- $70

Best Buy

•  Samurai Warriors 4-II -- $35
•  Rainbow Six Siege -- $50
•  Grand Theft Auto V -- $40
•  WWE 2K16 -- $40
•  Disney Infinity 3.0 Edition Starter Pack -- $50
•  Dragon Quest Heroes: The World Tree's Woe and the Blight Below -- $40

GameStop

•  Call of Duty: Black Ops III -- $40
•  Assassin's Creed Syndicate -- $40
•  The Crew: Wild Run Edition -- $30
•  Evolve -- $10 (GameStop) / Ultimate Edition -- $40
•  Destiny: The Taken King - Legendary Edition -- $40
•  Hasbro Family Fun Pack -- $20

Feel free to check out this week's PlayStation Store games here and this week's PlayStation Plus-exclusive games here. "Hardware: Rivals" and "Grim Fandango Remastered" are January's free games for PS Plus members.