I'll be honest, I'm probably not going to watch the "required" stuff, but I'll try to watch 31 movies anyway.
So far I've watched:
1. The Visit - I really, really enjoyed this. Thought it was a lot of fun, and the reveal was so simple that I'm surprised I didn't see it coming, I was completely expecting something over the top. Shyamalan definitely surprised me with this one.
2. Insidious 3 - I think I saw the first Insidious awhile back, but I don't remember too much about it. Some friends wanted to watch this. I thought it was pretty good, but not necessarily anything special. I did like that it was a prequel since I don't remember much from the first and I don't think I've ever seen the 2nd.
3. The Women in Black - I thought this was okay. Definitely nothing special, I don't think I'll be rewatching it anytime soon. Not too memorable, but I don't regret watching it. The first 2/3 of the movie was pretty good, but it fell apart at the end.
4. Poltergeist (2015) - I've never seen the original. I didn't think this was anything special. It was incredibly forgettable, nothing special at all.
5. You're Next - This was a good twist on the slasher genre. Nice "who dunnit" movie. Reminded me of the "Last House on the Left" in how it pretty much just turns into a revenge flick.
6. Detention - I have no clue if I liked this or not. I don't even know how to describe it. It's like Scream mixed with Back to the Future and The Breakfast Club. It's just really over the top, wacky, and weird.
7. Sitches - Eh, nothing special. Decent slasher movie. Pretty forgettable overall.
8. Cooties - Really enjoyed this, but I felt like the end was a bit weak. I thought it had a great cast. Made me laugh.
9. Friday the 13th - My all time favorite movie series, the first definitely isn't my favorite in the series, but it's still a great watch. I'm sure I'll see this about 999 other times before I die.
10. The Final Girls - Probably the best "new" movie I've seen this month, I thought this was a ton of fun. It was funny, smart, and had me smiling almost the whole time I was watching. I hope there's a sequel.
11. Texas Chainsaw Massacre (2003) - I know most people dislike this, but I've always thought it was pretty fun. It's a pretty generic slasher, but I never get bored while watching it.
12. Army of Darkness - Some good laughs, nice set pieces, and just a nice experience overall. Probably my favorite of the original Evil Deads (2013 is my favorite overall though).
13. Tales of Halloween - A nice anthology movie. 10 stories. I think it would've better if they cut it down to 6 or 7, because some were definitely weak. The strongest ones were great though, and I would've liked to see them expanded a bit.
14. Unfriended - I thought it was interesting how everything was shown through a computer screen, but other then that this wasn't that great.
15. Friday the 13th: Part VI: This was the first Friday the 13th movie I ever saw. Still easily one of the most enjoyable. First in the series where Jason is truly "undead" and has an actual nemesis, some great kills, pretty funny, and fully embraces its campiness.
16. Gremlins
17. Freddy VS Jason
18. We Are Still Here
19. Scooby Doo On Zombie Island
20. Hostel 1
21. Hostel 2
22. Halloween (2007)
23. Jennifer's Body
24. The Green Inferno
25. House of 1000 Corpses
26. The Devil's Rejects
27. House of the Devil
28. The Babadook
29. Berberian Sound Studio
30. Would You Rather
31. Annabelle
I'll update this with my thoughts later.
Haven't watched, but have them on my list:
A Tale of Two Sisters
Evil Dead (2013)
Trick 'r Treat
Friday the 13th Part II (My all time favorite movie!)