Granny Pills: Defend Cactuses

2075 12 months. After the invasion of aliens, there was nearly no life and oxygen left on Earth. The one plant that survived are cacti. The aliens need to destroy or steal all of the cactuses to cease the dwell on Earth. The courageous Granny who grows her cactuses on the highway (in order that they'll obtain rays of sunshine) ought to defend them from aliens. She found that the aliens are afraid of human drugs, and he or she has an enormous quantity of them, in addition to a shotgun loaded in case of emergency. Assist her and her cactuses to revive life on Earth and thrust back the aliens!
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