To get this achievement, you need to interact with 14 objects in Deadpool's apartment. You can see a list of these, below:
1. The brown chair used to watch TV. 2. The phone next to the recliner. 3. The dog behind the recliner. 4. The radio in the corner by the neon sign. 5. The old sofa to the right of the chair. 6. The bookcase behind the sofa. 7. The toilet in the bathroom by the kitchen door. 8. The bathroom sink. 9. The refrigerator. 10. The open pizza box to the right of the door. 11. The oven. 12. The pump by the bedroom door. 13. The computer. 14. The arsenal on the wall.