Here are some I’ve come across over the years, in case people want / need to play games of a given engine in a system other than the supported ones, or (points at a physical copy of Monkey Island I have) if the game is having trouble running on the supported system.
Also, considering if I should include more game-specific tools too, since Aquaria is pretty close there already, and if I should add how to identify the engines.
Also disclaimer, not all are FOSS / OSS.
ScummVM
Too many engines to reasonably list them, so as an exception, listing ScummVM instead of its supported engines.
➢ Compatibility list: https://www.scummvm.org/compatibility/
➢ Installers: https://www.scummvm.org/downloads/
For Aquaria (engine)
➢ Aquaria fork (for Linux, Mac and Windows): https://github.com/AquariaOSE/Aquaria
➢ Aquaria fork (for PSP):
➢ Aquaria fork (for Switch): https://github.com/dimag0g/Aquaria/tree/switch
For Artemis (engine)
➢ Artroid+ (for Android): https://myskrpatch.tistory.com/82
➢ Artroid+ (for IOS): https://myskrpatch.tistory.com/142
For Construct 2, Construct 3 and Tyrano Builder (engines)
➢ Joiplay (for Android): https://joiplay.net/
For Adobe Flash (engine)
➢ Ruffle: https://ruffle.rs/
➢ Ruffle plugin for Joiplay (for Android): https://joiplay.net/
For AliceSoft System 1, 2 and 3 (engines)
➢ system3-sdl2 (for Android, Linux, Switch, Windows; potentially more but requires compiling): https://github.com/kichikuou/system3-sdl2
For AliceSoft System3.x (engine)
➢ xsystem35-sdl2: https://github.com/kichikuou/xsystem35-sdl2
For AliceSoft System4 (engine)
➢ xsystem4 (for Unix-like systems e.g. Linux, and also Windows): https://github.com/nunuhara/xsystem4
➢ xsystem4-android (for Android): https://github.com/kichikuou/xsystem4-android
For Godot 3.x, Godot 4.x and Ren'Py (engines)
➢ Joiplay with their respective plugins (for Android): https://joiplay.net/
For Doom Engine / id Tech 1
For Godot 3.x, Godot 4.x and Ren'Py (engines)
➢ Joiplay with their respective plugins (for Android): https://joiplay.net/
For HTML-powered games
➢ Joiplay (for Android): https://joiplay.net/
➢ Web browsers and web servers (latter e.g. Python, run on the HTML file’s folder with python -m http.server 8000 and opening on the address http://127.0.0.1:8000).
For KiriKiri (engine)
➢ Kirikiroid2 Yuri and MiNE KiriKiroid2 Yuri (for Android): https://github.com/YuriSizuku/Kirikiroid2Yuri/releases/tag/1.3.9_yuri
NScripter
➢ NScripter plugin for Joiplay (for Android): https://joiplay.net/
➢ ONScripter+ (for Android): https://play.google.com/store/apps/details?id=com.onscripter.plus
RPG Maker 2000 & 2003
➢ EasyRPG (for way too many platforms): https://easyrpg.org/player/downloads/
RPG Maker XP, VX and VX Ace
➢ Joiplay (for Android): https://joiplay.net/
➢ mkxp (for Linux, Mac and Windows): https://github.com/Ancurio/mkxp
➢ mkxp-z (for Linux, Mac and Windows): https://github.com/mkxp-z/mkxp-z
RPG Maker MV and MZ
➢ Joiplay (for Android): https://joiplay.net/
➢ Web browsers and web servers (see “HTML-powered games”).
➢ Maldives Player (for Android): https://play.google.com/store/apps/details?id=net.miririt.maldivesplayer


Nice list, but i have Extra Engines i want to include:(Only engines considered “legal”,note: some of these i didnt test myself,but this may contain reverse engineering projects . )
For Omni-Engine (Lego Island branch only)
comments: it also adds new features and improvements to Lego Island like multiplayer(Experimental),WASD Support,etc.
ISLE-Portable:
Play it on your browser
Source code
For Touhou's/Seihou's engine games
PyTouhou (For EOSD branch only):
Caveats: missing some features,git server down due to LLMS,pre-build binaries are quite old.
Downloads
Source Code (likely down)
for PC-98 branch only:
Caveats: it doesn’t seem like it has cross-platform support.
comments: seems like its mainly focused on reverse engineering
Source code
marginally releated to Touhou but not really part of Touhou Project:
For Seihou Project (Shuusou Gyoku branch):
comments: Windows only binaries,Linux binary available as a Flatpak.
Source code
For Source engine games
comment: steam_legacy branch only,also does not work with TF2 Branch games,despite its name it also works on Windows,Macos and Most Linux distros.
Wiki about it
The SDK is also a thing too,but am not gonna include it here.
For Id tech 4 engine games(i think DOOM 3 branch only)
dhewm3:
Source code
RBDoom3BFG(For BFG branch):
Source code
for Space cadet pinball
comment:Yes that one Windows XP game.
Source code
for NetImmerse engine games(The Elder Scrolls III: Morrowind branch only)
openMW:
Download
Source code
for RPG Maker 2003(Oneshot branch)
Oneshot freeware(easyRPG):
Source code
I mainly includes engines i have heard off
Kinda busy for a few hours but will check later. Thanks!
yw,you may include them on the list if desired.