Drop zone, some free or uncertain keys, please write below if they work so I can cross them out:

Total War Attila: Blood and Burning - EQXJV-WPXDJ-PGBG? ?=7
Frontline Tactics Complete Pack - requires base game : G4TYF-5??YW-49DN? ?=7
According to this base game can still be acquired by no direct (steam store) approach
Luke itch.io key: https://robertolaudrup.itch.io/luke/download/vP3qg5tMr5QdySHnt3TnVaGkqV5p-RWXuHnCiZA7sip?7Eau6ahMbzEnh ?=9
Hektor - Official Soundtrack DLC: 5ZZCY-WV6NV-Q?PP5 ?=8
Hektor - Official Soundtrack DLC: REIJH-XXAW5-VFQF? ?=4