Portal - Companion Cube by Terror-Inferno on DeviantArt
Fan Art Friday: Portal [1/11/13]Another Castle
Turret Cube by KrowKills on DeviantArt
Portal Companion Cube Cutout by fangirlitis on DeviantArt
Portal companion cube pixel art by meigetsuneko on DeviantArt
Steam Workshop::My Stuff
Companion Cube Valentine by brandimillerart on DeviantArt
Day of Wrath [Doom 2016/Eternal rewrite], Page 2
Companion Cube- by obsceneblue on DeviantArt
Steam Workshop::xiaowen
Companion cube by CrazyRatty on DeviantArt
Portal - I'm Different by FabledCreative on DeviantArt
Steam Workshop::All Dyes and Costumes
Steam Workshop::Ouroboros Collection