A while ago, I was working on a retro FPS game in Unity. Nothing came of it, but I figured it was a shame to have it sitting around gathering dust, and my solitary CrocoJam entry has been widely viewed and downloaded, so I thought perhaps people would be interested in an asset pack based on it. So I created one, and as a Christmas present to the itch.io community, I'm releasing it for free!
https://altrix-studios.itch.io/retro-fps-asset-pack
The pack contains dozens of low-poly models and low-res textures, as well as their original Crocotile 3D and Aseprite files. It's all under a Creative Commons license, so you can do pretty much anything you want with it as long as appropriate credit is given.
Depending on feedback, I'm willing to try and update the pack with extra models and textures, and/or create further low-poly asset packs. So if there's something you'd like to see, let me know!