Installing IceWM Desktop for OpenBSD 5.6
The Unix Tutorial shows you Step-by-Step How to Install, SetUp and Run the IceWM Desktop Windows Manager on a Unix OpenBSD 5.6 System 32/64-bit.
Finally, the post’s Content is Expressly Reduced to Give Focus to the Essentials Instructions and Commands.

Open a Command Line Shell Session
OpenBSD How to Easy Find Repo URL for Installing New Packages.
OpenBSD Find Packages RepositoryInstalling the IceWM Desktop
sudo su
If Got “User is Not in Sudoers file” then see: How to Enable sudo
pkg_add -v icewm
OpenBSD Easy SetUp to Run the IceWM Manager.
How to SetUp OpenBSD to Boot Directly Into IceWM.
OpenBSD Display-Manager SetUp