Crimsonland. Yes, that's it!
Ever since Xbox Live indie I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1 released in 2009, I couldn't for the life of me remember the name Crimsonland -- only my fond, vague memories of blasting away at spiders and zombies. It's coming back with an overhauled version featuring "almost 100% new art" for Steam and PlayStation 4. The first trailer and screens hit today.
The official site mentions a few details, like a new enemy type and challenges. It's also the place to go if you want to sign up for the closed beta. And look at that badass Doom-esque art.