Duke Nukem 3D

3D Realms' game from 1996: the first episode, L.A. Meltdown, six levels of a Los Angeles the aliens have already landed in, as the shareware release 3D Realms gave everyone leave to copy. It runs in DOSBox, compiled to WebAssembly, on the files 3D Realms published, with the sound card and keys set up so it starts straight in.

Duke Nukem 3D

About six megabytes, fetched once and then kept by your browser. Sound and music are on.

Click the picture once to hand it the mouse.

W S or
forward and back
A D
strafe
turn
Mouse
aims, left button fires
Ctrl
fire
Space
open, use, press
E or /
jump
Z
crouch
Shift
run
Alt with a turn
strafe
1 to 0
weapons
Tab
map
Esc
the menu, and gives the mouse back first
F
fullscreen

Duke Nukem 3D is 3D Realms', copyright 1996. This is the shareware episode from 3D Realms' own ftp site, whose license.txt says individuals can and are encouraged to give away copies without charge and that free web sites may offer it for download; the files are in the bundle unchanged. The full game is sold by 3D Realms' owners today. Where every game in the arcade comes from, with its terms, is on the arcade page.