Deniska from DCemu forums has realeased a port of DG (Dave Gnukem).

Here’s a screen…

Here’s what Deniska has to say:

Dave Gnukem PSP

About Dave GNUkem
Dave Gnukem is a 2D scrolling platform shoot-em-up. It is very similar to (and inspired by) Duke Nukem 1.

Credits
David Joffe - Coding, sprites, levels.
Felix Richter - Documentation contributions.
Steve Merrifield - Level contribution.
Denis Televnyy - PSP Port.

PSP version features:

1) improved sound fx handling
2) music soundtrack support. I dropped an ogg file from NOIZ2SA as an example; any ogg/s3m/xm/mod file
can be used, just name it stage.[ogg/xm/s3m/mod] and drop it in the sounds directory.
3) snaphot mode
4) c/c++ source code with makefile profided for those who want to study/improve the game.
5) the game is very much modable: you can create new levels with the windows version editor and edit the
game’s graphics.

INSTALLATION
——–

1.5 users: copy contents of 1.5 folder to ms:/PSP/GAME
1.0 use EBOOT.PBP from 1.0 folder with data files from 1.5 folder
2.0 Please let me know if either version works with the latest eboot loader for 2.0 firmware

CONTROLS
—————-

[LEFT/RIGHT] MOVE LEFT/RIGHT
[R_TRIGGER/TRIANGLE] JUMP
[UP/SQARE] ACTION KEY
[X] SHOOT/MENU SELECT
[START] PAUSE/MENU SELECT/EXIT
[L_TRIGGER] SNAPSHOT

Enjoy,
DENIS

You can get DG here