Thanks!
Vast majority of assets come from here: https://assetstore.unity.com/packages/3d/environments/sci-fi/snaps-prototype-sci...
A couple things from here to (I think): https://assetstore.unity.com/packages/3d/environments/sci-fi/free-lowpoly-scifi-...
And enemies are from the Polyperfect pack that was in a humble bundle a bit ago: https://assetstore.unity.com/packages/3d/props/low-poly-ultimate-pack-54733