So, I'm working on a small RPG inspired by the tabletop RPG Gammaworld and a Swedish take on the same concept called "Mutant". It's being done in a faux C64-ish style, and using a Wolfenstein-like raycaster for the "dungeon crawling" part.
(Most of these images are somewhat mangled by the forum downscaling them, which causes some artifacts because of the CRT emulation filter, which is not present when running the actual game. If you want a correct feel for how it actually looks, make sure to view them in x1 scale.)
It's called Afterworld, and here's a title screen.
The game takes place in a post-apocalyptic world, where civilization has been destroyed, and earth is now populated by a few remaining humans, but mostly animals mutated into intelligent humanoid forms.
In the game, you play a private-eye kind of character, and it's going for a bit of that noir vibe in the writing.
The game centers around the town of Newton, and has multiple fixed locations you can visit.
In these locations, you can find characters to talk to, to find out more information about things, and sometimes recruit for your party.
A big part of the game is crawling through underground bunkers left from before the apocalypse.
They come with all modern amenities.
There are also levels which takes place outdoors, but they use the same raycast engine.
You can encounter a multitude of enemies.
And also be a victim of surprise attacks.
As for the more technical part, the level editor is custom built as part of the game, allowing me to toggle into editor mode whenever I want, to make adjustments as I test it out.
For the graphics, I use 3d renders of characters, and some custom filters I've written to make them look more pixel styled.
And I am doing a similar thing to process textures for walls/floors/ceiling.