Sigma Posting (Follow on BS)さんのイラストまとめ

Sigmarmos Knights

Source: Armos Knights
The Legend of Zelda: A Link to the Past (SNES) by Nintendo EAD

Goligma

Source: Golem
Castlevania: Rondo of Blood (PCE Super CD) by Konami

Sigmaphael the Raverick

Source: Raphael the Raven
Super Mario World 2: Yoshi's Island (SNES) by Nintendo EAD

Sigmaluigi

Source: Waluigi
Game & Watch Gallery 4 (GBA) by Nintendo R&D1 and Tose

One of the earliest attempts at a Sigma Post, so the medium head edit originally didn't exist.

The second version almost became the final, but after much deliberation I decided he needed a chin enhancement and some cool shades.

Anchor Sigma

Source: Anchor Man
Ai Cho Aniki (PC Engine Super CD-ROM) by Masaya

Vigma

Source: Vi
Bug Fables: The Everlasting Sapling (PC) by Moonsprout Games

Sigatema

Source: Gate
Mega Man X6 (Playstation) by Capcom

Catterpilligma

Source: Zone I Boss
Chip 'n Dale Rescue Rangers (NES) by Capcom

Sigmhaos

Source: Chaos
Shining Force (Sega Genesis) by Climax Entertainment and Sonic! Software Planning