I saw on irc that miqlas-H had gotten swars, the reverse engineered port of syndicate wars, working. He said he wasn't planning to hpkg it and that the port was quite easy, and as I love the game I've duplicated his work and made a quick recipe. Hpkg here: http://www.filedropper.com/swarsx86-03-1-x86gcc2
You need the data from the original disk to play, here are the instructions to install it:
Insert the Syndicate Wars CD and make sure it is mounted (e.g. in /cdrom or you can use an image and mount it somewhere).
Run swarsinstall-x86 -f SOURCE -t TARGET -l LANG -M, or
swarsinstall -f SOURCE -t TARGET -l LANG -M, where:
SOURCE is the game CD path, like /cdrom,
TARGET is the destination path, either /system/settings/swars or
~/config/settings/swars (depending on where you installed the package),
LANG is the installation language, and can be one of: eng fre ita spa swe.
Note that on haiku the installer can't currently rip the music, but you can
manually rip it to ogg format and place track_1.ogg, track_2.ogg and
track_3.ogg into /system/settings/swars/music or ~/config/settings/swars/music
Run swars, or swars-x86, to play!