Could you help me to find out what game is it? (no picture)

I don't remember well, since I saw its video almost 10 years ago (so obviously it's not a recent game).

It was a pixelized game where your character was trying to survive a zombie apocalypse in a city. I could say it looked like lego, but for real graphics were way simpler than that. It looked like a 3D game, but everything was pixelized and looked 2D. Maybe 2.5D is a better description, but graphics were not realistic at all.

If I had to get a reference of the visuals of the game, I would say it looked like Zelter. Graphics were simpler than Zelter, it was more urban and, at least on the video I saw, there was no direct confront against the zombies. It was more like a zombie apocalypse survival simulator.

Graphics looked simple and even silly, but the gameplay looked to be well elaborate, though it didn't look so complicated. Most of time you got into empty houses to try to find something useful to survive, like food or time to rest (I can't remember what you could get). Walking on streets was rare and a risk, since zombies were there always following you, so staying indoors was a better choice. Eventually, though, you had to move to other places, or else you would end trapped in the same place without resources (again, I can't remember what resources you could get). I remember the video ended when the character got into an other house, locked the doors and decided to sleep there for some hours. However, it appeared a message that during that time zombies managed to break into the house and kill the character (it was just a message, no scene was shown).

Thank you in advance!

Giveaway:
https://www.steamgifts.com/giveaway/FHmhf/ultros

Pics of Zelter that make me remember what I saw (houses and streets really looked like that):

View attached image.

View attached image.