Show HN: 3D shooter in your terminal using raycasting in Awk

Bring some old-school fun to your terminal! Explore the dungeon and shoot monsters in this pseudo-3D game inspired by the classic Wolfenstein 3D and Doom.

gawk -f awkaster.awk

You need gawk version >= 4.0.0

Your objective is to navigate the map and activate exit elevator, killing hoards of monsters in the process.


  • WASD — movement
  • p — shoot
  • num 1–4 — change color mode (4 is my favorite)
  • x — activate elevator (arrives after 1000 moves)

By default game resolution is 64x48 “pixels”, which are just a pair of ASCII symbols. That means your terminal needs to be at least 128 chars wide. You may change variables w and h to your liking.

Wall rendering is done using ray casting. Monsters and projectiles are added after that as sprites. Ray casting is a simple rendering algorithm that doesn’t require any 3d modeling or complex computation.

You can find an excellent tutorial here:

January 13, 2016 at 11:41AM
 via Hacker News