Cube (Portal 2) - Valve Developer Community

Portal 2 - Playstation 3 : Video Games

Source - Valve Developer Community

There's a fan-made N64 demake of Portal in the works

Portal 2: Community Edition - Developer Q/A #3

Portal 2 - Valve Developer Community

Source - Valve Developer Community

Portal 2 - Wikipedia

Portal 2: Community Edition - Valve Developer Community

Portal 2 - Valve Developer Community

prop_floor_ball_button - Valve Developer Community

Steam Workshop::Companion Cube

Portal 2 - Valve Developer Community

Portal 2 - Xbox 360 : Video Games

Portal Companion Cube LED Light-up Gift Box, Decor, Gaming Prop, Cosplay 9.5 Cm 3.74 Inch - Canada

Companion Cube - Portal 2 version - Download Free 3D model by rippomadness (@rippomadness) [b2ec84f]

Portal - Companion Cube by Terror-Inferno on DeviantArt

Companion Cube - Minecraft Dungeons Mods - CurseForge

Companion Cube 3D Model