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

Sigmen-an

Source: Gen-an
Samurai Shodown (SNES) by Monolith Corp.

Sigmushussu

Source: Mushussu
Castlevania: Dawn of Sorrow (DS) by Konami

SigmegaMan.EXE

Source: MegaMan.EXE
Mega Man Battle Network (GBA) by Capcom Production Studio 2

Happy Rockman Day!

Cyber Elf Sigma

Source: Cyber Elf X
Mega Man Zero (GBA) by Inti Creates

Happy Rockman Day!

Ultimate Armor Sigma

Source: Ultimate Armor X
Mega Man X4 (PS) by Capcom

Happy Rockman Day!

Hyper Sigmega Man

Source: Hyper Mega Man
Marvel vs. Capcom: Clash of Super Heroes (Arcade) by Capcom

Happy Rockman Day!

Sigmega

Source: Vega
Super Street Fighter II: The New Challengers (SNES) by Capcom

Sigmayasha

Source: Inuyasha
Inuyasha: A Feudal Fairy Tale (PlayStation) by Dimps

Dr. Sigmahead

Source: Dr. Baldhead
Guilty Gear (PlayStation) by Arc System Works

Cool Sigiraffe

Source: Cool Giraffe
Bubsy in Claws Encounters of the Furred Kind (SNES) by Accolade and Solid Software

Body edit from a sheet on TSR by Dolphman