None

A game whose 4k UHD method is "None" is a game with no 4k UHD support. Members of the forum have researched options for adding4k UHD support (registry keys, .ini, console, hack, etc.), and nothing has been found.

Stronghold Crusader HD

Free update for Stronghold Crusader which adds support for widescreen resolutions.

Yosumin!

"Yosumin!, Square Enix's puzzle masterpiece, is here! Simply select rectangles of the same type of yosumin to make them disappear in this simple yet challenging puzzle game." - Steam store page

2002 FIFA World Cup

2002 FIFA World Cup, sometimes known as FIFA World Cup 2002, is the official World Cup video game published by EA Sports. Some kits are licensed, along with player likeness and the stadia of the 2002 FIFA World Cup. Unlike the previous games in the FIFA series, the game had an original soundtrack performed by the Vancouver Symphony Orchestra. It was released for Windows, PlayStation, PlayStation 2, GameCube, and Xbox.

Earth 2140

Second game in the Earth series of real-time strategy games.

This is the original release sold at retail and on GOG.com and also bundled with the Steam HD version as "classic".

Alien Cabal

Stop an alien invasion in this sci-fi FPS originally released for DOS and later ported to Windows.

Echelon (2001)

First game in the Echelon series of sci-fi space combat games.

Underrail

No map or fast travel in this isometric RPG with turned-based combat. Underrail values exploration so much that the default progression system relies solely on finding special items (called oddities) instead of piling up experience points for every critter killed or quest completed. The game is not shy on dialog and characterization, but its heart beats for combat, crafting and the endless possibilities of stealth, brute force, traps or psychic warfare in a subterranean wasteland rife with loot and danger.

Wild Metal Country

Post-apocalyptic vehicle action game by DMA Design (now called Rockstar North).

Shadow Warrior

Japanese-themed FPS game made using the Build engine. Later followed by a reboot series.

Nicky Boom

Native port of the platform game originally released for DOS and other home computer platforms.