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

Wilysaurus Machine

Source: Megasaurus
Shinobi III: Return of the Ninja Master (Sega Genesis) by Sega

Beavigma and Sig-head

Source: Beavis (on left) and Butt-head (on right)
Beavis and Butt-head (SNES) by Realtime Associates

Lord of Gospel 1000

Source: Lord of Jewels 1000
Legend of Mana (PS) by Square

Red Sigmarremer

Source: Red Arremer
Super Ghouls 'n Ghosts (SNES) by Capcom

Jashalien

Source: Jashin
Ninja Gaiden (NES) By Tecmo

Sigmek

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

Siganon

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

Sigma Force

Source: Evil Force
Castlevania: Order of Ecclesia (DS) by Konami

Wily's Clown UFO

Source: Bowser's Clown Car
Super Mario World (SNES) by Nintendo EAD

Beligma

Source: Belth
Demon's Crest (SNES) by Capcom