Current relevant sales

The King of Fighters 2002 Unlimited Match is 7.49 on Fanatical
https://www.fanatical.com/en/game/the-king-of-fighters-2002-unlimited-match
Arcana Heart 3 Love Max Six Stars is 19.79 on GreenManGaming
https://www.greenmangaming.com/games/arcana-heart-3-lovemax-sixstars-pc
Guilty Gear XX Accent Core Plus R is 2.69 on Fanatical
https://www.fanatical.com/en/game/guilty-gear-xx-accent-core-plus-r
Chaos Code is only 4 dollars on GreenManGaming
https://www.greenmangaming.com/games/chaos-code-new-sign-of-catastrophe-pc/
Dragon Ball Fighterz - FighterZ edition (includes the first season pass) is 12.77 on GreenManGaming
https://www.greenmangaming.com/games/dragon-ball-fighterz-fighterz-edition-pc/
Guilty Gear Xrd Rev 2 with DLC characters is just 9.00
https://www.greenmangaming.com/games/guilty-gear-xrd-revelator-rev-2-all-in-one/
Uniclr is 16.74
https://www.greenmangaming.com/games/under-night-in-birth-exe-late-st/
BBTag special edition is 25 dollars
https://www.greenmangaming.com/games/blazblue-cross-tag-battle-special-edition-pc/
Battle Fantasia is just 1.50
https://www.greenmangaming.com/games/battle-fantasia-revised-edition-pc/

Usually, DBFZ costs way too much on "official" key sellers, so just get your grey market keys.
You can get FighterZ edition (base game + season 1 pass) for 13.78 on Eneba, just scroll down to the other offers.
https://www.eneba.com/steam-dragon-ball-fighterz-fighter-edition-steam-key-global
Get Fighterz Pass 2 for 13.80 on G2A.
https://www.g2a.com/n/dbfzpass2
Get FighterZ Pass 3 for 17.99 on GamesPlanet
https://us.gamesplanet.com/game/dragon-ball-fighterz-fighterz-pass-3-steam-key--3448-6

Speaking of keys, you can get most of these games for way cheaper on those sites even if there's no big sale currently going on with other sites.

Chaos Code is 2.37
https://www.g2a.com/n/chaoscode
Arcana Heart 3 Love Max Six Stars is 7.31
https://www.kinguin.net/category/44583/arcana-heart-3-lovemax-sixstars-steam-cd-key?r=greatdeal
Million Arthur Arcana Blood is 19.08
https://www.g2a.com/n/maab
Guilty Gear XX Accent Core Plus R is 4.24
https://www.g2a.com/n/ggxxacpr
Guilty Gear Xrd Rev 2 with all DLC characters is 6.21
https://www.kinguin.net/category/62664/guilty-gear-xrd-revelator-dlc-characters-rev-2-all-in-one-steam-cd-key?r=greatdeal
BlazBlue Centralfiction is 2.78
https://www.kinguin.net/category/36442/blazblue-centralfiction-steam-cd-key?r=greatdeal
BlazBlue Cross Tag Battle Special Edition (includes the DLC characters) is 13.24
https://www.g2a.com/n/bbtagspecial
The King of Fighters 2002 Unlimited Match is 12.68
https://www.kinguin.net/category/22966/the-king-of-fighters-2002-unlimited-match-steam-cd-key?r=greatdeal
The King of Fighters XIII is 4.95
https://www.kinguin.net/category/19871/the-king-of-fighters-xiii-steam-edition-steam-cd-key?r=greatdeal
The King of Fighters XIV is 19.31
https://www.kinguin.net/category/37891/the-king-of-fighters-xiv-steam-edition-steam-cd-key?r=greatdeal


A few PS4 games are available at a lower price now as well.

Guilty Gear Xrd Rev 2 is 26 dollars on Amazon
https://amzn.to/3cjjdYM
BlazBlue Centralfiction is 29.49
https://amzn.to/3em2Ayh
Under Night in Birth Exe Late [st] is 36.99 (updates to CLR when patched)
https://amzn.to/3t1rQOn
Million Arthur Arcana Blood is 2303 Yen (21.10) on PSN.
https://store.playstation.com/ja-jp/product/JP0082-CUSA11716_00-0000000000000000
DFCI is 75.60 HKD (9.74 USD)
https://store.playstation.com/en-hk/product/JP0177-CUSA03475_00-ASIA000000000001
The JP version of DFCI is 1537 Yen (14.09 USD)
https://store.playstation.com/ja-jp/product/JP0177-CUSA03475_00-DFCIGNITION00000?smcid=psapp

Need a Japanese PSN card?  Get one for cheap on G2A.
https://www.g2a.com/n/psn1000jpy
https://www.g2a.com/n/psn3000jpy
Or a  Hong Kong card in the case of HK DFCI
https://www.g2a.com/n/hkpsn80