(There's no video for Sigma Chess yet. Please contribute to MR and add a video now!)
Please contribute to MR: Fill in Sigma Chess description now!
sigma-chess-51.sit (1.88 MiB / 1.97 MB)
/ compressed w/ Stuffit
sigma-chess-402-lite.hqx (1.17 MiB / 1.23 MB)
/ BinHex'd, use Stuffit Expander
Emulating this? It should run fine under: SheepShaver