Theme interpretation – “Timeless”

Project Description:

DOOM is a timeless classic — simple, fast, and endlessly fun.
For this Unity Game Jam, I wanted to celebrate that feeling by recreating the spirit of DOOM using Unity’s own legacy assets.

I actually wanted to create this kind of game for quite some time so I might have stretched the game jam theme to fit my idea into it :D I wanted to add so much more but making this in 48h required cutting a lot of what I have planned to add.

This is a submission for 2025 Unity 20th Anniversary Game jam.

I will be posting on how I made this game at https://www.youtube.com/@SunnyValleyStudio :)

Assets used:

Built with the “4.2_Stealth – Unity Through the Ages” asset pack, I transformed the char_robotGuard model into 2D billboard sprites, built the level by reusingthe textures and sounds from that pack to craft a short retro FPS. I have added pixelation effect using a full screen render feature in URP and played around with lighting to make it feel like an older game.

The project combines classic gameplay mechanics — walking, shooting, and keycard-locked doors — with Unity’s modern tools like URP pixelation and the new Input System.

Additional assets include a CC0-licensed weapon model, font, and HUD elements:

https://opengameart.org/content/40-free-metal-textures-from-mtc-sets

https://rekkimaru.itch.io/fps-gun-sprites

https://github.com/sparklinlabs/superpowers-asset-packs