Found a list of keys, not sure which I've used so lets get into the Christmas spirit and do some giving

1. F̶i̶r̶s̶t̶ ̶u̶p̶,̶ ̶t̶h̶e̶ ̶l̶a̶s̶t̶ ̶t̶w̶o̶ ̶n̶u̶m̶b̶e̶r̶s̶ ̶a̶r̶e̶ ̶t̶h̶e̶ ̶y̶e̶a̶r̶ ̶t̶h̶a̶t̶ ̶T̶e̶r̶m̶i̶n̶a̶t̶o̶r̶ ̶w̶a̶s̶ ̶r̶e̶l̶e̶a̶s̶e̶d̶ ̶ ̶
   ̶H̶M̶B̶2̶G̶O̶5̶2̶7̶A̶6̶Y̶N̶3̶G̶P̶J̶P̶-̶-̶
2. T̶h̶e̶ ̶m̶i̶s̶s̶i̶n̶g̶ ̶n̶u̶m̶b̶e̶r̶s̶ ̶a̶r̶e̶ ̶t̶h̶e̶ ̶y̶e̶a̶r̶ ̶o̶f̶ ̶t̶h̶e̶ ̶D̶a̶m̶b̶u̶s̶t̶e̶r̶ ̶R̶a̶i̶d̶s̶ ̶ ̶
   ̶9̶E̶R̶R̶Q̶-̶-̶J̶9̶C̶I̶E̶C̶4̶Y̶
3. T̶h̶i̶s̶ ̶n̶u̶m̶b̶e̶r̶ ̶g̶e̶t̶s̶ ̶a̶ ̶w̶h̶i̶s̶t̶l̶e̶ ̶w̶h̶e̶n̶ ̶p̶l̶a̶y̶i̶n̶g̶ ̶b̶i̶n̶g̶o̶ ̶a̶s̶ ̶i̶t̶'̶s̶ ̶a̶ ̶s̶e̶x̶u̶a̶l̶ ̶p̶o̶s̶i̶t̶i̶o̶n̶.̶.̶.̶o̶h̶-̶e̶r̶r̶ ̶ ̶
   ̶-̶-̶N̶P̶Y̶F̶2̶3̶J̶E̶4̶Z̶F̶R̶I̶ ̶
4. All the numbers are there but you need to re-arrange the 3 sections of the key
   T4C7V 0FP3E 4NWGR
5. T̶h̶e̶ ̶y̶e̶a̶r̶ ̶t̶h̶a̶t̶ ̶A̶d̶a̶m̶ ̶W̶e̶s̶t̶'̶s̶ ̶B̶a̶t̶m̶a̶n̶ ̶s̶e̶r̶i̶e̶s̶ ̶s̶t̶a̶r̶t̶e̶d̶,̶ ̶I̶ ̶t̶h̶i̶n̶k̶ ̶a̶ ̶f̶i̶l̶m̶ ̶o̶f̶ ̶t̶h̶e̶ ̶s̶h̶o̶w̶ ̶w̶a̶s̶ ̶a̶l̶s̶o̶ ̶r̶e̶l̶e̶a̶s̶e̶d̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶y̶e̶a̶r̶ ̶ ̶
   ̶K̶G̶-̶-̶A̶6̶2̶9̶W̶L̶X̶N̶4̶M̶B̶ ̶
6. N̶e̶l̶s̶o̶n̶ ̶M̶a̶n̶d̶e̶l̶l̶a̶ ̶w̶a̶s̶ ̶r̶e̶l̶e̶a̶s̶e̶d̶ ̶f̶r̶o̶m̶ ̶P̶r̶i̶s̶o̶n̶ ̶ ̶
   ̶5̶Z̶C̶T̶W̶5̶A̶-̶-̶9̶G̶D̶0̶G̶5̶
7. In Roman numerals this year would be MCMXXXVIII, convert it and use the last two numbers.
   D616G--2GF7FM
8. These are letters, you put this on your toast for breakfast.
   ---M2X622JM6N57
9. '̶N̶e̶e̶d̶ ̶y̶o̶u̶ ̶T̶o̶n̶i̶g̶h̶t̶'̶ ̶w̶a̶s̶ ̶a̶ ̶b̶i̶g̶ ̶h̶i̶t̶ ̶b̶y̶ ̶I̶N̶X̶S̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶y̶e̶a̶r̶ ̶ ̶
   ̶2̶P̶0̶4̶9̶W̶R̶T̶2̶A̶G̶8̶T̶-̶-̶ ̶
10. T̶a̶k̶e̶ ̶t̶h̶e̶ ̶l̶e̶t̶t̶e̶r̶s̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶n̶a̶m̶e̶ ̶o̶f̶ ̶t̶h̶e̶ ̶c̶o̶m̶p̶a̶n̶y̶ ̶t̶h̶a̶t̶ ̶p̶r̶o̶d̶u̶c̶e̶d̶ ̶t̶h̶e̶ ̶B̶e̶e̶t̶l̶e̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶G̶o̶l̶f̶ ̶a̶n̶d̶ ̶r̶e̶v̶e̶r̶s̶e̶ ̶t̶h̶e̶m̶.̶ ̶ ̶ ̶
    ̶V̶X̶Z̶5̶B̶2̶-̶-̶Y̶7̶4̶3̶F̶T̶D̶
11. T̶h̶e̶s̶e̶ ̶t̶w̶o̶ ̶n̶u̶m̶b̶e̶r̶s̶ ̶a̶r̶e̶ ̶u̶s̶e̶d̶ ̶i̶n̶ ̶p̶l̶a̶c̶e̶ ̶o̶f̶ ̶l̶a̶u̶g̶h̶i̶n̶g̶ ̶i̶n̶ ̶e̶m̶a̶i̶l̶s̶ ̶"̶h̶a̶h̶a̶"̶ ̶e̶s̶p̶e̶c̶i̶a̶l̶l̶y̶ ̶i̶n̶ ̶T̶h̶a̶i̶.̶ ̶ ̶
    ̶Y̶T̶V̶J̶7̶F̶B̶T̶T̶Y̶Z̶G̶-̶-̶V̶ ̶ ̶
12. Missing letters are all the same, 10 point tile in scrabble (2 to choose from...good luck getting the right one!)
    5-H3BI--3WVXS5P-
13. A̶l̶l̶ ̶t̶h̶e̶ ̶r̶i̶g̶h̶t̶ ̶p̶a̶r̶t̶s̶ ̶o̶f̶ ̶t̶h̶e̶ ̶k̶e̶y̶ ̶i̶n̶ ̶t̶h̶e̶ ̶w̶r̶o̶n̶g̶ ̶o̶r̶d̶e̶r̶ ̶a̶g̶a̶i̶n̶,̶ ̶r̶e̶-̶a̶r̶r̶a̶n̶g̶e̶ ̶t̶h̶e̶ ̶t̶h̶r̶e̶e̶ ̶s̶e̶c̶t̶i̶o̶n̶s̶ ̶ ̶
    ̶E̶W̶K̶W̶G̶ ̶ ̶ ̶ ̶ ̶A̶7̶G̶2̶D̶ ̶ ̶ ̶ ̶ ̶ ̶W̶8̶V̶R̶I̶ ̶
14. H̶a̶r̶r̶y̶ ̶S̶.̶ ̶T̶r̶u̶m̶a̶n̶ ̶d̶i̶e̶d̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶y̶e̶a̶r̶ ̶ ̶
    ̶-̶-̶4̶D̶H̶K̶H̶3̶B̶6̶Q̶P̶A̶L̶9̶ ̶
15. T̶h̶e̶ ̶y̶e̶a̶r̶ ̶t̶h̶a̶t̶ ̶t̶h̶e̶ ̶m̶o̶v̶i̶e̶ ̶t̶h̶i̶s̶ ̶q̶u̶o̶t̶e̶ ̶c̶o̶m̶e̶s̶ ̶f̶r̶o̶m̶ ̶w̶a̶s̶ ̶r̶e̶l̶e̶a̶s̶e̶d̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶y̶e̶a̶r̶ ̶ ̶
    ̶ ̶"̶S̶o̶m̶e̶b̶o̶d̶y̶ ̶o̶n̶c̶e̶ ̶w̶r̶o̶t̶e̶,̶ ̶"̶H̶e̶l̶l̶ ̶i̶s̶ ̶t̶h̶e̶ ̶i̶m̶p̶o̶s̶s̶i̶b̶i̶l̶i̶t̶y̶ ̶o̶f̶ ̶r̶e̶a̶s̶o̶n̶.̶"̶ ̶T̶h̶a̶t̶'̶s̶ ̶w̶h̶a̶t̶ ̶t̶h̶i̶s̶ ̶p̶l̶a̶c̶e̶ ̶f̶e̶e̶l̶s̶ ̶l̶i̶k̶e̶.̶ ̶H̶e̶l̶l̶"̶ ̶ ̶
    ̶9̶6̶G̶5̶E̶I̶M̶W̶7̶X̶A̶W̶-̶-̶C̶ ̶ ̶
16. T̶h̶e̶ ̶y̶e̶a̶r̶ ̶[̶t̶h̶i̶s̶]̶(̶h̶t̶t̶p̶s̶:̶/̶/̶w̶w̶w̶.̶y̶o̶u̶t̶u̶b̶e̶.̶c̶o̶m̶/̶w̶a̶t̶c̶h̶?̶v̶=̶E̶l̶1̶k̶g̶C̶q̶D̶7̶X̶k̶&̶s̶a̶f̶e̶=̶a̶c̶t̶i̶v̶e̶)̶ ̶s̶o̶n̶g̶ ̶w̶a̶s̶ ̶a̶ ̶b̶i̶g̶ ̶h̶i̶t̶ ̶ ̶ ̶
    ̶7̶R̶Y̶M̶H̶9̶K̶Y̶-̶-̶6̶W̶2̶N̶4̶
17. M̶i̶s̶s̶i̶n̶g̶ ̶l̶e̶t̶t̶e̶r̶s̶ ̶a̶r̶e̶ ̶a̶n̶ ̶a̶n̶a̶g̶r̶a̶m̶ ̶o̶f̶ ̶N̶E̶W̶T̶
    ̶X̶W̶R̶M̶4̶5̶Z̶J̶L̶Z̶-̶-̶-̶-̶E̶ ̶
18. B̶o̶t̶h̶ ̶m̶i̶s̶s̶i̶n̶g̶ ̶n̶u̶m̶b̶e̶r̶s̶ ̶a̶r̶e̶ ̶t̶h̶e̶ ̶a̶t̶o̶m̶i̶c̶ ̶n̶u̶m̶b̶e̶r̶ ̶f̶o̶r̶ ̶O̶x̶y̶g̶e̶n̶ ̶ ̶
    ̶-̶A̶G̶B̶3̶-̶W̶X̶6̶L̶B̶4̶T̶9̶Y̶
19. F̶i̶r̶s̶t̶ ̶t̶w̶o̶ ̶l̶e̶t̶t̶e̶r̶s̶ ̶o̶f̶ ̶t̶h̶e̶ ̶b̶i̶g̶g̶e̶s̶t̶,̶ ̶m̶o̶s̶t̶ ̶p̶o̶w̶e̶r̶f̶u̶l̶ ̶g̶u̶n̶ ̶i̶n̶ ̶t̶h̶e̶ ̶g̶a̶m̶e̶ ̶D̶o̶o̶m̶ ̶ ̶ ̶
    ̶4̶3̶K̶D̶8̶-̶-̶D̶0̶L̶Q̶W̶8̶M̶5̶ ̶ ̶
20. T̶h̶e̶s̶e̶ ̶l̶e̶t̶t̶e̶r̶s̶ ̶a̶r̶e̶ ̶t̶h̶e̶ ̶m̶i̶s̶s̶i̶n̶g̶ ̶n̶a̶m̶e̶ ̶f̶r̶o̶m̶ ̶t̶h̶i̶s̶ ̶t̶i̶t̶l̶e̶ ̶"̶?̶?̶?̶ ̶M̶c̶K̶r̶a̶c̶k̶e̶n̶ ̶a̶n̶d̶ ̶t̶h̶e̶ ̶A̶l̶i̶e̶n̶ ̶M̶i̶n̶d̶b̶e̶n̶d̶e̶r̶s̶"̶ ̶ ̶ ̶
    ̶T̶2̶0̶-̶-̶-̶9̶Y̶4̶R̶T̶A̶P̶F̶T̶

Please lease a comment if you claim the game or it's not working

That's it for tonight, might add more tomorrow. Have marked off the ones that were taken and the names of the games confirmed, silent ninjas may have got the others. Think these were all the games, in no particular order...

UPDATE

Seems they've all gone, but not sure if there was a problem with 7.
The key I have written down is...
Gratuitous Space Battles - D616-G382-GF7F-M
Maybe a mistake.
Anyway. Thanks for playing along. Will close this soon.