At least one person here, Ocelot, has been in one of these games already. It could mean that he is a sheep in this one as well.
The other interpretation is that it could refer to the only confirmed sheep in this game so far: Big Boss. [he grits his teeth] In that case, it would mean the one made from a part of him: me.
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The other interpretation is that it could refer to the only confirmed sheep in this game so far: Big Boss. [he grits his teeth] In that case, it would mean the one made from a part of him: me.