RPG Maker VX Ace is free on Steam.
https://store.steampowered.com/app/220700/RPG_Maker_VX_Ace/

112 Operator is free on Fanatical. You get a Steam key.
https://www.fanatical.com/en/game/112-operator

I guess I will post an image then.

Control?

King Kong 2: Ikari no Megaton Punch for Famicom

Yes!

HORACE

Vambrace: Cold Soul is free on GOG.
https://www.gog.com/game/vambrace_cold_soul

The Dark Eye: Chains of Satinav is free on GOG.
https://www.gog.com/game/the_dark_eye_chains_of_satinav

The flowers on the middle door gave me Monsters Inc. vibes. Is it that? Let's say it's PS2 version.

Scourgebringer is free on Fanatical. You get a Steam key.
https://www.fanatical.com/en/game/scourge-bringer

Chicken Assassin: Reloaded is free on GOG.
https://www.gog.com/game/chicken_assassin_reloaded

Is that Kid Chameleon?

Yes, it is!

Really sorry for the delay. Here's the screenshot:

Astral Chain then

AI Somnium Files?

Thomas Was Alone

Correct.

Piglet’s Big Game?

Conker's Bad Fur Day? These door look like something from that game even thought I haven't played it :D

Oaken is free on GOG.
https://www.gog.com/game/oaken

Breathedge is free on Fanatical. You get a Steam key.
https://www.fanatical.com/en/game/breathedge

Dark Sector is free on Steam.
https://store.steampowered.com/app/29900/Dark_Sector/

Diggles: The Myth of Fenris is free on GOG.
https://www.gog.com/en/game/diggles_the_myth_of_fenris

Spirit of the North is free on Fanatical. You get a Steam key.
https://www.fanatical.com/en/game/spirit-of-the-north

*The deal ends in 4 days and 5 hours.

Return of the Phantom is free on GOG.
https://www.gog.com/en/game/return_of_the_phantom

Unloved is free on Fanatical. You get a Steam key.
https://www.fanatical.com/en/game/unloved

Minimalism is free on Steam until 12 Oct.
https://store.steampowered.com/app/585690/Minimalism/