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

Sigmouge the Batton

Source: Rouge the Bat
Sonic Battle (GBA) by Sonic Team

Ki Sigmer

Source: Ki Hunter
Super Metroid (SNES) by Nintendo R&D1 and Intelligent Systems

Sigmedusa

Source: Medusa
Super Castlevania IV (SNES) by Konami

The Seven Sigmas

Source: The Seven Heroes
Romancing SaGa 2 (SFC) by Square

Sigmarina Ligmayears

Source: Marina Liteyears
Mischief Makers (N64) by Treasure

Sigmalachi / Cthuligma

Source: Malachi / Cthulu
Castlevania: Symphony of the Night (PS1) by Konami

BuzzSigma Lightyear

Source: Buzz Lightyear
Sprite by @ReyBowchers

Stinkosigma

Source: Stinkoman
Stinkoman 20X6 (PC) by Homestar Runner

Cressigma

Source: Cress
EndCycle VS (PC) by 12B3

Vigma

Source: Viper
Azure Striker Gunvolt (3DS) by Inti Creates