Something interesting I noticed about the portal gun from the Lego Dimensions Portal 2 pack is that the rubber mold for the gun actually ends right where that little light is on the top of the portal gun, so the end of the mold ends up resembling that little light. The people at Lego are absolute geniuses! Also, we need Half-Life Lego sets in the future. C'mon Valve.
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The actual Lego Dimensions Portal Level is full of awesome easter eggs.