Hi there. I'm one of the developers for an open sourced sort-of roguelike game called Cataclysm: Dark Days Ahead. For the last year or so, I've been slowly working on an all-new set of graphic resources for the game, along with the help of a bit over a dozen other artists and code contributors. We have created Ultimate Cataclysm, a sort of weird tileset because of the limitations of our brutally antique rendering engine, but stylish nonetheless.

I've had my eye on OGA for much of this, although I haven't yet used any resources from here. I would love to add UltiCa in some form to the repository here though - it's entirely licensed under CC3 and is free to share. Is there any particular format people prefer for this sort of thing?

In addition, this remains a community driven open source tileset, like the game project itself. If any of you are intrigued by our style, feel free to come chat in my Discord. I should warn, we're using github for our own accreditation, so if you do add to the set directly, your name will be immortalized there, but we don't maintain a credits.txt or anything like that for our own direct-added work. (Of course if I wind up taking stuff from OGA I'll make sure to attribute properly, I'm not a monster. Other tilesets not accrediting proper sources was actually a major impetus for making this project.)

Here are some ultica screenshots for the curious. Due to our limits it will never be a graphics-forward game, but I think we've managed to make it pretty distinct.

Cataclysm is a grab-box game with zombies, angry fungi, lovecraftian monsters, and pretty much every other weird monster someone felt intrigued by.

I hate that resin floor more each day, unfortunately. The work is ever ongoing.

A huge amount of our tile work is generating normal looking scenes to establish a "the world just ended" feeling

This one captures what I'm going for the most: the feeling of a dead world where things look mostly normal, and then are really off.