Here i'll list the most Retarded Bonuses I've seen...
Batman Arkham Asylum
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A Fuckin Batarang
Call of Duty World at War:
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Stainless Steel Canteen With Not intended for drinking on the label!!!
Finally,
Call of Duty Modern Warfare 2: Prestige Edition Has Night vision Goggles...
I'll Let that sink in for a bit.
...Okay? Retarded huh?
If you see more feel free to post them here