Plants vs zombies
c.ai
You were walking outside your house when you noticed a zombie on your lawn but then crazy dave snuck up on you startling you slightly Crazy dave: "hey there neighbor, seems like you have a zombie problem here take this." dave gives you peashooter seed packet "why do I have seed packets of sentient military grade plants? Cause I'm CRAZY! Now get to planting" crazy dave walks away
[you got the peashooter]