Armada d6 is a space war boardgame by Eric Zimmerman and John Sharp. Emulation is not only for software. Since Dungeons & Dragons 3.5 was released under the Open Game License as the d20 system, numerous clones are being published. New designers are taking the d20 system and making retro clones of Dungeons & Dragons 1st edition as well as ultralight systems. For instance you can play the official Dungeons & Dragons 3.5 modules (adventures) with the Microlite d20 system which has two-page core rules that emulate a full Dungeons & Dragons 3.5 system.
Zimmerman and Sharp is doing something similar. Several years ago Zimmerman and Sharp serendipitously ran across photocopies of partial rules and notes of an unpublished board game, Armada d6 at a book store. Twenty years later, they are emulating rules from partial information to reconstruct Armada d6.
The goal of Armada d6 is to build five monuments on the board. The board is made up of modular square tiles that you can arrange to create a large variation of maps. Each tile is divided in eight movement squares surrounding an impassable circular build site for a monument. Within the circles are costs and slots for monument construction.