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

Shin Sigmraygon

Source: Shin Draygon
Crystalis (NES) by SNK

Emperor Sigmraygon

Source: Emperor Draygon
Crystalis (NES) by SNK

Sigber

Source: Saber
Melty Blood: Type Lumina (PC) by French-Bread

Sigmaxima

Source: Maxima
The King of Fighters XI (PS2) by SNK Playmore and G1M2

Sigourney of the Sigma Cybernetic Attack Team

Source: Sigourney
S.C.A.T.: Special Cybernetic Attack Team (NES) by Natsume

A guest edit by @SpriterGors

Pulley Sigunner Bros.

Source: Pulley Gunner Bros.
Contra: Hard Corps (Genesis) by Konami

Epsigmalon Eagle

Source: Epsilon Eagle
Alien Soldier (Mega Drive) by Treasure

Draculigma

Source: Dracula (Form 3)
Castlevania III: Dracula's Curse (NES) by Konami

Custom Sigma head by @hansungkee1

Sigmavoc

Source: Havoc
Metal Warriors (SNES) by LucasArts

Goligma

Source: Golem
Alcahest (SFC) by HAL Laboratory