I've been thinking about this for a while and now that we have the new challenge system perhaps it would be a good time to bring it up.

How about alongside the regular challenges we have a regular challenge/collaboration/project based on expanding on an existing work or set of works?

• Kind of like micro-LPCs
• A set of existing assets as a guide and ideally also simple templates for easy editing
• Focus on accessibility to facilitate maximal participation (single frame sprites, small fixed tileset template, minimal animation, simple styling, etc.)
• Encourage a standardisation of license (CC0 for templates, CC-BY for submissions?)
• Reasonably long time frame to give participants plenty of time to join in and get the work done (maybe monthly or bimonthly frequency?)

These kinds of source works are what I have in mind (from latest art and favourites cos I'm lazy, not that there aren't plenty of other deserving submissions on the site):

• Redshrike's RPG battle sprites - single frame per charater
• Kenney's iso tiles (1, 2) - simple, clean styling
• Blarget2's minimalist Pixel tileset - again simple, clean styling
• Erbarlow's Golden Pipes - simple template
• Chris Hamons et al.'s Dungeon Crawl 32x32 tiles - single frame per object
• Frenden's NES-style game tiles - simple styling, limited palette
• richtaur et al.'s Bomb Party (1, 2, 3) - simple styling, limited animation
• usr_share's 8-bit puzzle game sprite set - simple styling
• Clint Bellanger's Tileset 1bit Color - single frame per object

If members wanted to create bespoke templates for this that would be cool too.

Of course need not be just graphical or just 2d graphics, but that's what I'm most familliar with and what I expect to be generally most widely accessible.