GQ6JD-5@%5&-&20DN_Decimation of Olarath
@ = F
& = B
% = I

Probably all dupes but maybe someone gets lucky

! = 9
@ = 7
$ = 8
% = 5
^ = 0
( = 3
KEXN5-!XGYY-TT7PJ The Great Jitters: Pudding Panic
AWADY-MPHER-FKHR% Grim Fandango Remastered
A3YHE-JY@3X-6PBE3 Grow Home
VR!!L-WDNBP-P8DCF Guacamelee! Gold Edition
6PCEH-W2W6T-KBBD$ The Guild II Collection
HLXRT-CGP7A-3FID^ Gunpoint
XHF6!-7GPGY-QPKLP Hack 'n' Slash
EV4PP-EYJ4!-T8C3T Hammerwatch
59TXF-RD$CL-RVC7W Hand of Fate
9B54F-0ZXMR-EI$PN Hard West
4D4YB-TTCR9-G5!KP Hate Plus With Soundtrack
BHW$M-3TEVQ-W6JME Hatoful Boyfriend
LK92L-3YLEB-MPA3! Haunt the House: Terrortown
C0AT$-PFIGW-P7E66 Hero Siege
T05R6-DQEZP-((AAE Holy Potatoes! A Weapon Shop?!
GNW2B-NFC8H-2!H5X Human: Fall Flat

----------------MISC ------------
If you somehow got the base game but not the multiplayer key here are some for you
Im pretty sure one of this works

HI4P-V!3P-BCTE-B Gratuitous Space Battles Multiplayer Key
D61M-2V@6-H56L-T Gratuitous Space Battles Multiplayer Key
D61W-FN7G-4W$7-H Gratuitous Space Battles Multiplayer Key

3R2DZ\0RPM9\7A6EL 16bit Trader
YN4W9\WYG94\EPRNR Evolve Beta
TQ8DY\PXA7X\7RE76 Endorlight
648X5\JZZHY\9WVA4 Forbidden planet
ZTVDA\VA5PY\RDCP2 Forbidden planet
FYLQ7\GPM98\9ZQCJ Deadbreed
ZJC90\5V79M\L5JRP Deadbreed
AX6IJ\8JIAA\8RW7Y Deadbreed
QCZBW\TAKL6\FP88T Particula
0X0V2\IH8NJ\MJDTZ Unknown Battle
4JBD4\VGLXF\TNNAV Unknown Battle
ZJLPQ\V44BP\3B2X7 Unknown Battle
YYHKP\7VZBZ\P38Q8 Heaven Island Life
YNDWG\YGAGT\6E828 Heaven Island Life
E83L3\C6463\F5JNV Heaven Island Life
QWPRL\CD3PM\3NXGF Heaven Island Life
TNEG4\9Y6DJ\CTDDD Heaven Island Life
DNDVI\M3MKQ\HICE3 Heaven Island VRMMO
V69AG\X3VZI\732LN Heaven Island VRMMO
ZGECF\W2ARN\CJBG5 Heaven Island VRMMO
WFEFL\YW562\FCDDB Heaven Island VRMMO
P2L77\YZ60R\TCKZX Heaven Forest - VR MMO
A2RR7\RJH93\0Q2BF Journey To The Center Of The Earth
VB2RJ\DZG4X\TZQHH Journey To The Center Of The Earth
MG3VY\7YHEY\57L8E Journey To The Center Of The Earth
CFGJD\JDM8W-HYGYC Journey To The Center Of The Earth
8EWT4\HJ46M\ZV46F Villagers and Heroes: Hero of Stormhold Pack DLC
55ZJ6\8NCBP\TKF6J The Deer
5PDP9\FZC90\VCR03 The Deer
FP78L\DRBG\4X4HN The Deer
Q075F\XZDKA\KGZDT The Deer
2YHJY\Q9VLL\80Q4C The Deer
YN83C\38DEE\WJJMY The Deer
4VMRT\MGMTA\WDCE6 Woodle Tree Adventures
YI62N\DJ3XJ\KTKG4 Woodle Tree Adventures
9MN8H\A4AJX-D9RZA Woodle Tree Adventures
HDL5F\WXD0K\3QW8I Woodle Tree Adventures
F4G0M\NW3RX\W9QQ5 Weapons genius
3GZD7\4MNEV\CMQA6 Weapons genius
DMFHY\MF2IH\55MBY The Next Door
EX3XE\AMED0\9L8V7 The Next Door
BIMYQ\J075C\IIC64 Grave prosperity redux-part-1
Q34WH\RVX3E\V0KD8 Yellow: The Yellow Artifact
9NRCJ\5V8CR\KV02Z Yellow: The Yellow Artifact
YGJ6B\EWZR6\RLKQC Yellow: The Yellow Artifact
T29KF\GX93I\I4X6X Yellow: The Yellow Artifact
GKRV8\GHYWP\G6H7R Strayed
6WH7M\QKFPY\7DJ6R Unforgiving Trials: The Darkest Crusade
Q7GJ2\EPIKT\JQTJB Unforgiving Trials: The Darkest Crusade
HI25N\J6G5P\T4KLB Unforgiving Trials: The Darkest Crusade
DB3T0\ATY4Z\BK223 Forge of Gods Promote Pack
5AYXK\F0KX0\XXZ0C Medieval Mercs
BGM48\062QA\HXY67 The Note
W246H\T0XAE\7RMMT Space beret
0802M\X9HPW\KBD62 Space beret
PQHK2\WQ7I9\7NJBH Strayed (Brine)

It is from Giveawayhopper:
https:||roomsforrockets.itch.io|a-shawn-story|download|51nyWgEbrEWGTXgrMyikvUdA9Jw23-6of2UXHnea1ugoWLRKSEq79Sprz

Heaven Forests Night
X3QCG-Y7CE2-46HKx
x = I

Vickinachi
6T0N2-Z9VZ3-GH5Xx
x = N

Totally Accurate Battle Zombielator
MWCPR-6NJND-36P9x
x = L

Decimation of Olarath
FC33Y-EB40R-K6XNx
x = G

Wordlase - Soundtrack   STEAM   F3XN2-2030J-2?7GC 

? - one after 2

Disastr_Blastr - Soundtrack_to_Disastr  STEAM   ZRII7-7PPLI-HMC?Y 

? - one after 7

Loot Rascals Soundtrack     STEAM   3KLM?-MY7GW-K3P0Z   

? - one after 3

Superfluous keys from IG Indie Blaster bundle I don't need.

Sparkle 2 Evo:
706PQ-EXMMN-QVML and the last one is H
Merchants of Kaidan:
6VMBL-69253-RG97 and the last one is Y
Timberman:
735ZT-077MZ-GWPY and the last one is C

Sid Meier's Civilization® III: Complete: KYAG9-DRK9D-0962N
Sid Meier's Civilization® III: Complete: L4HED-TE6CJ-TLLRW

Minion Masters: DQ84K_NQM0T_ND3RZ
replace the underscore with hyphen

DupedOrNot
Woodle Tree Adventure: Q0QWH-79XXB-N3EK7
Unforgiving Trial The Darkest Crusade: I8WV3-EWL9J-6MEQ2

Maybe this key still works, maybe not

G380K-JLPTP-DMWIE
Outlast Deluxe Edition

Vanguard Princess - Artwork and Soundtrack DLC - MFFYG-KMVG7-XWFGJ
Vanguard Princess Director's Cut DLC - RQ6JM-6F3Q5-IR0FF

Loot Rascals Soundtrack
https://www.humblebundle.com/gift?key=3zHM???3NhTe4b5Z

??? = Head-up display (all 3 letters are capitals)

Normality ATRHJ-D6C2Q-7X??G

?? = 6*5

Guns of Icarus 0DVXM/WJ2DD/RF8R3

WJ7E0-WAJG3-33QY3

The South Park Twitch Prime stuff.

I messed up a giveaway and used these keys instead of the correct ones. realised it after the giveaway ended I replaced them quickly with the correct keys, but it took a bit so I have no idea how many are redeemed.
piggy princess
GXDHD-R4YGQ-KXRXI
QMRQ4-KH9TY-6QWMB
K0TVM-XHEZG-YTXRL
33TV5-PLXGA-74GV8
70RC0-X8JAV-M4P6P
ZD70E-TZFTV-V7GEW
72ZDL-Q3HQ5-07N37
X5AYT-N9JWM-FLYZH
PAZ7V-VRZ5N-CM7QB
9JI2T-PMT4R-D7L93
YXVQ2-0ZEK7-KZYHG
VIVWZ-LKKJV-YX9XW
HV4DA-ZY94V-NCEW0
TAXYT-JZ9QW-8XW49
Q8XII-VDMRZ-0PVYW
787KC-W359Q-XB7ZG
6EXY7-GCXYP-YXCFN
2HPEQ-3F7T4-J73HI
55BGI-5VQNK-2AP5K
W400W-XEXJ5-J4WWL
5Q8BR-TIWI9-XITQG
CITI2-X2I9F-TDI96
NFIYP-GI4JB-7F6ND
5X743-JPKM7-VRN60
6L99X-8NQJ0-X402T
503N2-PXYBI-MAK9V
0XE6F-DM004-HCAHW
BIL9V-6G7YT-8IDW8
KTAEM-AK0VF-8KFCC
Z4XQK-ADTIB-8EHE3
A3INQ-67QVJ-RVWJ4
D5JI4-8HZ6G-JF4A5
74WNM-XFE49-EIHVG
40WHJ-RV4DL-XAKZJ
FP72Z-37WQ3-3EZ8G
4VQEP-ADEKD-KNHAZ
8HN6C-C29AK-I7V08
W28BH-9RXZD-ERWHI
NPQKP-YGH3Z-4JCZK
JPTEW-3V790-9YYPI
TH2JK-YE3YB-MQAF5
WI6KW-PEE5L-NP5WB
GNDF3-7GYVY-HALPV
JKHH8-4MIY9-0TP2V
MF85G-D6Y0Z-AIACY
PCXTC-MCDPF-TP63P
ZDLX0-XPX6M-CLNMB
HL0DI-B2R3Q-B9QME
LAT4I-MZ058-BKDK9
GY0HJ-AK70M-NLD2L

Again most probably all dupes (exept DESURA and UPLAY) but maybe someone gets lucky

@ = 8
! = 2
$ = 0
% = 5
^ = 3
AEPK@-5WT5D-46IYP Humble Bundle for Android
EJXPQ-YLKA!-XGAEH Humble Frozenbyte Bundle
FYV2C-5E26N-DH4K3-FPR5C-J4MSZ Humble Indie Bundle #2
HIB3A-AL41K-JTS$S-PPZLO-QA3CL Humble Indie Bundle #3
!F7CF-44F33-6N2NH Humble Indie Bundle #3
NV5QN-L7N2M-Y@DDN Humble Indie Bundle #4
HGE84-03Y3E-0WZ$3 Humble Introversion Bundle
DXYN0-JW3BY-$L4R3 Humble Voxatron Debut
XYI%J-JIBHM-CJTGN ibb & obb - Best Friends Forever
AL9H%-WDWZH-N7CX2 Ice Lakes
W78PE-TT3IE-$NDFH Imagine Me + Soundtrack
4D5CN-4@2B2-QFB6X The Incredible Adventures of Van Helsing
5FNF5-K7$9Z-7B9HX Incredipede
GRB3D-695K8-V@WZK Indie Game: The Movie
H^ANM-CFTYC-LHTDW Infested Planet

---------- DESURA
INTRO-FFDV6-HQC4B-IPXQ^-P!^ZI Humble Introversion Bundle Desura Key

------------ UPLAY
EGGB-D(3+1+2)RW-VG7(3+3)-RQMK Rayman® Origins

BoneBone (DupedOrNot)
PKRNE-DC22A-7KVA7

Itch.io Games, replace = with /
https://roomsforrockets.itch.io/a-shawn-story/download=
FhC4md5GwKBbsqxhiDK1vUdA9Jw23-BnYBaJXYxvuAuT8hejcjVem4TKEh
https://ponyasha.itch.io/luna-game/download=
1-JmiCPdW3vhWNrHiYnF2DVaGkqV5p-8fPLx7p5MEZhLtMdNKgKpD3zh3Sp
https://cadmaster.itch.io/drago/download=
F4pS6XwBF2Qi85Sreqd6vUdA9Jw23-YGBWVpr8JuaW61tf8tdFjR5iawph
https://cadmaster.itch.io/lost-man/download=
GUBNK3C33UXN6cYB5nWnVaGkqV5p-EUdCwWAdCwDVMTZtxtANnUCzPTt
https://divertic.itch.io/undead-lake/download=
431-3WtLEYVNPUd1MHy9royBVaGkqV5p-68UksPFAD3nGHhStYhPUp3mdnVpp

Mysterium: A Psychic Clue Game
MEARD-6AD47-WA?PX
?=2^3

Devils Share: Y5EB5_V3Z4P_KGKIC

Remove the underscore and put hyphen symbol

Misc random keys from HB for non-steam stuff, or steam DLC things. Going back as far the Yogcast Xmas bundle from this past year. No idea if any these are still good, some should be.

Good luck.

Games that require the Epic Games Launcher:

Shadow Complex Remastered
9W7PC-3B?G@-5H3A-T3?54
and
9UX7E-WESX%-GP7?5-P?3%?

Paragon Gunslinger Pack
3R7VK-P?HFJ-66LF9-L7YBB

King Arthur's Gold Direct Download Multiplayer Activation key
?f?cf5%c95%aada903fd4709fb9bdfc0
(go to http://www.kag2d.com/en/ and register to use your activation key)

Neverwinter Gilded White Steed
?aFlzRAp

Crossout - Thug Starter Pack
4WFK4-TKC7K-PCZ%7-?H9HY-X4P%N-D%F?7
(how to redeem it HERE )

Robocraft Eagle Pack
0CBE-?9EE-?10?-47E5
(how to redeem it HERE )

Random Steam key dump

Battlerite DLC: YogYog Bear Mount
BYV%J-M@D?@-YF0VN
(steam key, but you have to own the game to redeem; it is not a F2P game)

HackyZack
E@PLL-TWFTF-HFX6W

Stories Untold
FJ%4F-WH?LA-XNAMR

Nongünz
GGF?4-P3NWK-BPP4D

Duke Nukem’s Bulletstorm Tour DLC
5GI%M-YNXLN-INVHV

Robot Roller-Derby Disco Dodgeball
HAJG6-Y7540-P@E7X

? = 2
% = 8
@ = Q