Orphan keys drop thread

Zombie Kill of the Week Reborn: (enin)(eerht)(evif)H(thgie)-EYBQW-PQDZX
Super Inefficient Golf: QY(neves)(enin)(orez)-QAMHW-FAMN(orez)
Snow White Solitaire Charmed Kingdom: E(neves)JPP-THEJ(ruof)-MAAQC
Revhead: KMH(orez)H-YCENB-(thgie)QLVK
PewDiePie Legend of the Brofist: (eerht)T(ruof)BP-CEXWL-M(evif)W(orez)(eerht)
Neon Chrome: ZHHQ(owt)-(evif)ZA(thgie)R-(owt)Q(owt)QQ
Killing Floor: G(evif)GDB-TN(thgie)WF-N(xis)PLF
STARWHAL: (eerht)(xis)(xis)LB-(enin)EGNN-C(owt)ZQW
Car Mechanic Simulator: BPG(evif)W-LWYXI-FXY(neves)(evif)
Aegis of Earth: Protonovus Assault: B(neves)(enin)MY-(evif)GMHJ-(eerht)I(xis)QX

Axis Game Factory's AGFPRO Zombie FPS Player - DLC
AGN7E-ILDLN 5EZY7-
7FD94 4PWW8 -KQ7CC-

@@PE3-QALVT-B9PVI
function key. Red cross in upper right corner

AXKZF-5ZXRW-@@26A
To me, it's Oliver Rolf Kahn, but to the world, it's Gianluigi Buffon.

CBL@P-K4Y@W-LAMVZ
The Super Cub does not have this so that it can run in the middle of the desert.

Madden NFL 22 on Origin

?7UC-F28C-HKCY-5P2U-NHVT

? = 3*2

?NWT6-WA37E-QJQTQ (? = 2+2)

IXC6R-@PVRX-@WX9G
Sir, I am not a descendant ; I am an ancestor.

DLC : Rise of Flight: Legendary Bombers
*****-?????-#####

[*****] = .--- -.... --.- .-- -.-.
[?????] = .- .-.. -.-- -.... -.
[#####] = .--- .. -.... .. .-.

How many fingers on the average human hand = %
First Letter in the Second Word in the games title = #
Spongebob sing that this letter "Is for friends who do stuff together" = *

Jagged Alliance 2 - Classic 9%%%-WECD2-Z8#4

House of 1000 Doors: The Palm of Zoroaster
K!GHI-Q5LXA-?05EZ
? = 5+3
! = 1+2

X5M46-K5E5Y-MYF?Q ?=1+1+1+2-2

Iris and the Giant: Card Deck Roguelike - QYVZT-ZY2GP-A?YIW ?=square root of 64
Book of Demons - K90DT-?2299-9PZKY ?=first letter of the alphabet
Toybox Turbos - LGDWF-QQL29-RK?BW ?=3*3
Gone Home + Original Soundtrack - 4KE24-D9W54-M5YQ? ?=last letter in dog
Smile For Me - AAKDI-JPRCH-RB?67 ?=the same as the number after it

LEAVES - The Return
FV? PW-RPI??-JKHNE

? =L

Blackguards 2
I?24Q-X2YMV-!4FPE

? = 7-2
! = 5+2

Retimed
GPC?W-6?2RM-Q73P8

? = K

V0RF4-IT74?-AGNII [?=3+1-1] some delisted game

JI2DJ-TYCWsix-7threeMTK magicka dungeons and daemons

Really Big Sky
B06KM-R(Total Vegetation Killer)Y-MFDR0
(Board Governance Committee)G4-B3X5J-WGLZ8
CAIPN-9TE87-NF(London Fashion Week)
CN376-9Y0L3-(Professional Development Year)Z3
CPEPK-ZRXYQ-(Naval Engineers Journal)7R
CX(Zipper Protein Kinase)-B7XNR-R8XJ8

Deponia
CW(After Image Journaling)-L0IFL-W27AP
CY6(Kommunistische Partei)-XR0KF-4(Xilinx Foundation)3B
D0R7W-0M5(Prime Minister)-3F2(Dividend Yield)
G2JLW-(Mobile Branch Exchange)39-ID2YJ
GL0HM-4Y(Zero Fuel Mass)-Z6GE9

Zombie Shooter
8WY08-F(Great Japanese Dog)5-B3XHF
8Y(Federal Bureau of Investigation)-5DX4H-XP74V
(Advances in Robot Kinematics)60-N3KF4-YYI96
(Airline Transport Pilot)I8-DT4LV-A94FI
(Generalized Likelihood Ratio)G6-A78VE-P74A6

M.U.D. TV
9N7Q4-Y(Reparable Exchange Activity)6-3KFI8
A8Q2B-B5EI8-(Through Hole Mount)YY
AVDK8-XFZ8K-B4(Enterprise Generation Language)
B3AQY-HAEX8-4(Electronic Medical Record)E
B8I60-C(Go Null Yourself)Z-YQ2Q9

Greed: Black Border
EDIIB-MWHPB-76(Host Card Emulation)
EX0ED-K3LX4-8(The Mushroom Kingdom)4
(First Nation)70W-AN3A3-30(Health Care)6
(Helium Neon Laser)7M-QYBHQ-E7FI3
HXN0N-0(Knowledge Base)6G-JI7(Jupiter Research)

Crusader Kings 2
76V0D-9(Multi-Target Tracking)T-DZEIW
7(Green Economic Zone)H-IY4EN-EY4T4
AQ6(Engineering Design)-6G2(Enterprise Architecture)-Y6829
B5KDT-72DZR-E8(Key Client Management)
R22F3-V7ZVM-62(Verenigde Willebroekse Zwemclub)

Altitude
BEQ84-7Y(Hungry Hungry Hippos)-67ZHR
BKIWR-J04Y7-9C(High-Risk Behavior)
CAT6P-(Bachelor of Fine Arts)TV-V8Z2A
(Concept Checking Question)GE-QQIAZ-0JQQW
(Destroy All Humans)R2-WA9FE-N4XEM

Pixel Puzzles: UndeadZ
DK?Z9-V32ZL-Y?ARN
? = G

Star Wolves 3: Civil War
AQER?-GJAYB-MKPXI
? = 3x2+1

?YAY6-2F08Q-IMKWP
?=3*3
Some delisted game

The Dropping of the Dead
IN5?3-QVMMC-?P8BZ
?=6

The Dropping of the Dead (Steam)

https://imgur.com/IvoxZxe (captcha image)

DOOM64 on Bethesda.net Launcher

~HM9-4U~B-P@4G-2RB2-KB@R

Quick maths:

~ = 6 / 2
@ = 2 * 4

Dead Space 'Origin Key'... Any takers?