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

Sigmadotsuki and Sigboa

Source: Madotsuki and Uboa
Yume Nikki (PC) by Kikiyama

Σ. Sigdio

Source: O. Dio
Live A Live (SFC) by Square

Turf Maverick Sigma

Source: Intro
Neo Turf Masters (Neo Geo) by Nazca Corporation

Zelosigma

Source: Zelos
The Ninja Warriors (SNES) by Natsume

Sigmonslaught

Source: Onslaught
Marvel vs. Capcom: Clash of Super Heroes (Arcade) by Capcom

Sigmonslaught

Source: Onslaught
Marvel vs. Capcom: Clash of Super Heroes (Arcade) by Capcom

Sigmalamoth

Source: Galamoth
Castlevania: Symphony of the Night (Playstation) by Konami

Three Headed Sigmankey

Source: Three-Headed Monkey
The Secret of Monkey Island (PC) by Lucasfilm Games

Sigmadred

Source: Everdred
Earthbound (SNES) by Ape and HAL Laboratory

Sigma Breath

Source: Fire Breath
Sonic the Hedgehog 3 (Genesis) by Sega Technical Institute