Cleaning, may the best bot win:

Cyber Hook Demo 9RQVX-V3NTJ-YX6QE
Turnip Boy Commits Tax Evasion Demo K4PFQ-ZGJPJ-IHNP4
Glyph Demo 4I9GJ-77Z5L-2MLQL
FUSER™ - Look Pack: Battery Power CQW7L-XJBPK-PZ2GZ
Heavy Metal Machines - Dirt Devil Pack CJGG9-JNYGY-Z9DRG
Heavy Metal Machines - Dirt Devil Pack 6QN7J-CX8FQ-VJYV2
RISK: Global Domination - Europe Map Pack BQKTM-Y0C6K-I85X9
RISK: Global Domination - Europe Map Pack 248H8-NR438-FQW5P
RISK: Global Domination - Europe Map Pack WVZ5L-VFLG0-8ANVM
RISK: Global Domination - Europe Map Pack 2HJID-6RK8N-R5EEL

Crowfall 10 day trial (From AWA)
ALIINWARE-0F3E-1923A28A-0520
It is alien not aliin

1. Redeem your Code at crowfall.com/join-the-battle.
2. Play Crowfall for 10-days starting when you activate your code.
3. Offer ends August 31st at 11:59 pm CDT.

GOG code for "Encodya"

JRSM1E7?C5?D456?C4

? = zero

L?56R-JMN3P-ZTABF

?=G

Back 4 Blood Open Beta
KBK5Q-R88KR-?6TZJ
ND60J-MPZG7-C?R4G
?576H-TCPXT-BXXHR

?=tW0

Fall Guys - Dragon Hugger Costume Pack:
K87IJ-FPIM0-NLJ??

?? = Team Fortress

Perimeter:
B8N58-EMD6I-JT6J9

Somes twitch prime rewards keys :

DAUTLESS
"Weapon Skin"
YzgMNL-Cfab7e-nmHvso-z4ctUe-FFjbYc

AION
"Pass Aura de Siel"
OC2MUBS2LQXH2YMIA5BM

GUILD WARS 2
"Booster pack with mini pet"
C66N2Q-VLDFW-MHPN-9F1-7GJ2N7J

Genshin Impact
"Lot Prime Gaming #1"
9B6T52PQ2KTV

should be Pinball FX3 - Carnivals and Legends (DLC)
Y3IJN-*9I8K-BHJB0
A

43ZPM-TDD?G-?CJYH
(?+1)Z90I-FWZQH-K(?+1)ADA
DV(?+2)QQ-(?+2)7EYI-KPL0P

? = siх

AL?7B-W5L?H-R?Z??

(1+6-3+4-5-3)

Aion Classic

T4ABS2PY9H6Q48DOWC63

AER Memories of Old

PR5C8-KDL63-XXAYZZ-407N0
PJHXJ-6XB7I-XXFYZZ-RJB52
PD3ZT-C2QEH-XXBYZZ-V7EL8
PGNNN-95L48-XXNYZZ-JJQFM
D77BX-3HPV6-XXUYZZ-PMKRX
D5IVB-4CD8E-XXOYZZ-F6A5C
PHBL8-QWNIZ-XXPYZZ-QNAEH
D77HA-6VKKL-XXTYZZ-Y9VZ9
PT42I-7RAEG-XXLYZZ-P6C0B

Delete XXxxZZ things.

Rebuild 3: Gangs of Deadsville

4ZDLR-XDLX6-XXAYZZ-NILNV
4ZBEN-F0FTT-XXFYZZ-EPGJA
4ZBD2-I4MD7-XXBYZZ-2YPB0
4Z9BG-6RGRA-XXUYZZ-X3YP4

Kni@htShift
ICZ5F-20BRW-8V#KT
I#YPF-ED43R-3IT2@

XH65-J9IJB-FVRXY

4@KX-69DAZ-W602@

Q=#+@=G

AironBall: The Floating Lands
??JD6-4?VTY-G9?B5

?=steamgiFts

Postal:
D(Great Indifferent Robot)7-RZ09G-GH39R
(Duck Quickly Quacks)LP-JB4HB-WCM3A
(Doom Vroom)2B5-MFLX3-3WIY4
F0AJD-7N4H6-(Reset Video Cards)4N
F2(Electronic Music Box)-6V3VH-PHYJJ
F9FPC-B3AIR-(New Knights Wedding)V8
(Free Acting Morticians)RW-64IE9-QVP3P

PAW2Y-CLN0W-8Z6X5

Out of Space (https://store.steampowered.com/app/400080/Out_of_Space/), in this month's Humble Choice so don't try to redeem if you're planning on buying this month:
G8C78-<10>22C4-<18>E5EE

Swap ALL letters to numbers, e.g. 2 -> B, B -> 2 (so code really starts with 7, not G)

Solar System NIRRV-JWHGT-R?QXW

?=2+2

Planet Alpha
G7T?E-M?5A4-02GE5

? = Number of legs a stink bug has

Zombie Shooter:
9V6A5-AJ7BR-4CTGA

Hammer 2 574I?-MM2IX-AYZNF

?=2+2