Welcome Back is an alternate ending to Portal 2, based off the thought "what if those four singing turrets did shoot?" This mod will make you run and think while you solve the last tests in hopes of escaping once and for all. You'll also get a look into some interesting never before seen areas of Aperture, if you survive...
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Basically a material emancipation grid(fizzler)that acts as a activator when a player walks through it after firing (a) portal(s) or physic objects get dissolved by touching it.