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I know people who have played them and loved them, but I’ve never actually played them myself. You can order the cube with a ring holder, with a foam
Portal Companion Cube Gift & Ring Box
Companion Cube Vector by CoffeeDaze on DeviantArt
Portal 2 Companion Cube 6 Gift Box
Portal ® Companion Cube Ring Box (XXKNPD6ND) by UrbanoRodriguez
Portal Companion Cube LED Light-up Gift Box, Decor, Gaming Prop, Cosplay 9.5 Cm 3.74 Inch
Weighted Companion Cube, Source file: www.brickshelf.com/ga…
Weighted Companion Cube - Wikipedia
How I made a life-size Companion Cube
3D Printed Portal Weighted Companion Cube
Sarah - Companion Cube (Portal)
How to Make a Origami Companion Cube from Portal « Origami :: WonderHowTo
Portal Weighted Storage & Companion Cube by 3D Gloop!, Download free STL model
Aperture Science Weighted Storage Cube, Half-Life Wiki
Companion Cube & Storage Cube (Portal) Free 3D Model - .fbx - Free3D
Companion Cube - modular, snap-together, colorized by Ellindsey - Thingiverse