Because "UPD" (updated) files are highly sought after, malicious actors sometimes use the keyword to hide bad files on sketchy third-party download sites. To stay safe:
The community has been busy. Here are the most popular, fully updated texture packs as of this month: Ddnet Texture Packs UPD
An "UPD" (Update) in this context usually refers to: Because "UPD" (updated) files are highly sought after,
: Change the look of the "Tee" (your character), the map tiles, and game entities (like hammers, pistols, and laser rifles). the map tiles