ZZT game world licenses

This is a list of ZZT game worlds which permit at the very least free redistribution, split into a few categories:

Free cultural works - games which satisfy the criteria of “free culture”; for example, works under the MIT license, or CC BY/BY-SA licenses.
Freely redistributable - games which have clear language signifying that they may be freely distributed,
Non-commercial - games which have clear language signifying that they may be freely distributed for non-commercial purposes.
Controversial - games which satisfy one of the above categories, but have some objections preventing their free redistribution.

Free cultural works

Name	Author	License	Content warnings	Description
David: Beast Wrestler	PogeSoft	CC BY-SA 4.0		Short action game
Metal Saviour Bia	PogeSoft	CC BY-SA 4.0		Action/engine-heavy sci-fi adventure game
The Quest for Coffee	PogeSoft	CC BY-SA 4.0		Short adventure game
Cyber Purge	The Green Herring	CC BY-SA 4.0	References to Nazi war crimes (if in-game content filter is disabled)	Action/puzzle game
Hell's Fury	The Green Herring	CC BY-SA 4.0	Descriptions of violence/corpses, Satanic imagery	Short action game

Name	Author	License	Content warnings	Description
Demonstration World	Tim Sweeney	MIT		Official engine demonstration world, originally bundled with ZZT.
Play-Pen	PogeSoft	CC BY-SA 4.0		Experiments collection.

Name	Author	Terms	Description

Name	Author	Terms	Description
Neil C. Obremski's Worlds	Neil C. Obremski	CC BY-ND 4.0	Assorted worlds compilation.
ZZTHIN	PogeSoft	CC BY-ND 4.0	Art collection.

Name	Author	Terms	Description

Name	Author	Terms	Description

Name	Author	Terms	Issue
Game of XYZABCDE	zzo38	Public domain	Usage of trademarks and content from a fiercely protected franchise; license permits editing them out.