Xbox Game Pass - Harold Halibut, Botany Manor, LEGO 2K Drive, Diablo 4, Evil West, Control:UE, Dead Island 2 out now

Play new games and earn points (+50) - Earn an achievement in a recently added game.
Shrewd Sleuth - Dead Cells - Find your first secret zone. As soon as you spawn into the game, run left, jump up against the wall, then roll into the secret zone for the achievement. Source. Note, this will double count for the Earn points with Dead Cells quest.

Earn points with Dead Cells (+100) - Complete two achievements in Dead Cells.
Shrewd Sleuth - Find your first secret zone. As soon as you spawn into the game, run left, jump up against the wall, then roll into the secret zone for the achievement. Source. Note, this will double count for the Play new games and earn points quest.
Love the Serenity… - Reach the Promenade of the Condemned for the first time. When you spawn into the game in the Prison quarters, go through the door to the Promenade of the Condemned for this achievement. Source. Note, this will double count for the Play new games and earn points quest.

Earn points with Jump Force (+100) - Complete two achievements in Jump Force. Note this game has very few achievement guides on the internet so I did my best to find these achievements, but they might end up not in fact being the easiest or requiring additional steps. As I actually get these achievements, I’ll update here if any changes need to be made.
Building an Army - Registered characters in all preset team slots. When you’re in the lobby, press the menu button, select Customize Battle/Battle Options, Register Team, Team 1, and then set a character for each slot. Then do the same for Teams 2 and 3. Source.
This Party is Just Getting Started! - Used emotions 10 or more times. In the main lobby, press and hold RB, then use LS to select an emotion and release RB. This will trigger an emotion, and doing this 10 times should give you the achievement. Source.

Earn points with Shocktober (+50) - Complete any achievement in the Shocktober collection.
Altered States - >observer_ - Overdose on synchronization pills. To do this, go through the beginning tutorial and the subsequent opening credits. When you enter the apartment building, use Y to open the PDA and X to take a pill. Repeat the process three times for the achievement. Source. Note, this will double count for the Play ID@Xbox to earn points quest.

Play ID@Xbox to earn points (+150) - Complete three achievements in any combination of ID@Xbox games.
Altered States - >observer_ - Overdose on synchronization pills. To do this, go through the beginning tutorial and the subsequent opening credits. When you enter the apartment building, use Y to open the PDA and X to take a pill. Repeat the process three times for the achievement. Source. Note, this will double count for the Earn points with Shoctober quest.
Don’t even get me started - Ruiner - Finish Prologue. Pretty self explanatory, just go through the prologue at the beginning of the game. Source. Note, if done on PC this will double count for the Play a game on PC and earn points quest.
Gotta get pumped! - Ruiner - Do 1003 pushups. This is potentially annoying, but requires very little effort. To do a pushup, you just hold up on the D-pad, or X if you’re doing this on PC. The hard part of this achievement is that you have to do them all in one go. To do 1003 pushups, you’re gonna need to hold that button down for around 16-17 minutes. You could try taping or weighting the button down to make it easier. Also make sure your controller doesn’t fall asleep by periodically moving the right stick. Source. Note, if done on PC this will double count for the Play a game on PC and earn points quest.

Play a game on PC and earn points (+50) - Complete an achievement on PC.
Don’t even get me started - Ruiner - Finish prologue. Pretty self explanatory, just go through the prologue at the beginning of the game. Source. Note, this will double count for the Play ID@Xbox to earn points quest.

Sign into the Xbox Game Pass mobile (+100) - Check the recently added games, sign into the mobile app on 4 different days, and download a game on mobile. Same as the last few months, they just added one more step to view recently added games.

Earn 10,000 points in 10 days (up to +10000) - To enter, earn 500 Gamerscore and claim 500 points. After that, every Gamerscore point will be matched, up to 10,000 points. This quest is active October 18-27. The current list of games available for this seems to be a combination of the games for the Play new games and earn points quest and some of the games from September’s Earn 10,000 points in 10 days quest. I’m hoping Microsoft will be adding to this list of games by the time the quest actually goes live. Here is the current list:

Dead Cells
Metal Gear Solid HD Edition: 2 & 3
Creature in the Well
Gonner - Blueberry Edition
Devil May Cry 5
Stellaris: Console Edition
Blair Witch
Minecraft
Lego city undercover
Mortal Combat X
Pro Evolution Soccer
Halo: The Master Chief Collection

Conquer all ten missions

All ten Operation: Cosmic Rescue missions must be completed by 10/31 to save your sidekick and earn exclusive rewards

Mission 1 | Any tracking device Done! By visiting this page, you've already completed your first mission.

Mission 2 | Computer or smartphone Using your computer, tablet, or smartphone, visit your Rewards page to complete at least three daily sets. 1

Mission 3 | Smartphone Use your smartphone to complete 20 searches on Bing each week for three weeks between 10/1/2019 and 10/29/2019—using either a mobile browser or the Bing app. 2

Mission 4 | Any tracking device Earn 500 points on any device between 10/1/2019 and 10/31/2019 – try taking quizzes, clicking through Microsoft Rewards emails, or completing offers on the Microsoft Rewards app on your Xbox One console. You can track progress by coming back to visit the challenge punch card. 3

Mission 5 | Xbox One Visit the challenge punch card on your Xbox One console and click on Mission 5. Get there by opening your Microsoft Rewards app on your console and finding the punch card tile and clicking it. 4

Mission 6 | Xbox One Play any Xbox game on your Xbox One console and earn a single achievement. After earning the achievement, return to the punch card on any device and click on Mission 6. Get there by clicking the punch card banner on the Microsoft Rewards page or the punch card offer within the Microsoft Rewards app on your Xbox One console.

Mission 7 | Xbox One Complete the weekly set on the Microsoft Rewards app on your Xbox One console every week for three weeks between 10/1/2019 and 10/29/2019. Get there by opening your Microsoft Rewards app on your console. 5

Mission 8 | Any tracking device Click on Mission 8 on any device to claim 100 points and donate them to a nonprofit of your choosing.

Mission 9 | Any tracking device Click on Mission 9 on any device to start a Bing scavenger hunt. Answer all three questions to complete the mission.

Mission 10 | Any tracking device When you have finished all nine other missions, come back to the punch card page on any device and click on Mission 10. Congrats! You have finished Operation: Cosmic Rescue.

Do I need an Xbox One console to participate? Yes. Some tasks can only be completed with an Xbox One console.

Do I have to complete all of the missions in order to earn the rewards? Yes, all 10 missions must be completed to earn the final rewards.

Do I need to be signed-in to my Microsoft account? Yes. Make sure you are signed in before completing each activity.

What if I am using a tablet? Tablet activity will be counted as computer activity—not mobile activity.

How soon after completing a mission will I receive credit on the punch card? Each punch card action will be marked as complete immediately after the mission is completed. If you still aren't seeing credit for completing a mission, try clicking on the mission within the punch card on web or Xbox One console. Tracking may be delayed a few days.

How do I claim my rewards once I complete every mission? 2X Bing search points will be automatically applied from 11/1/2019 to 12/1/2019 and for mobile searches only. You will be automatically entered into our Xbox Galactic Giveaway Sweepstakes. Free Xbox Game Pass Ultimate must be claimed via your Rewards page. You will see a tile for the free month of Xbox Game Pass Ultimate on your Rewards redeem page to claim.

*1. A daily set is a collection of three activities on your Rewards page. Three days of sets must be completed for this mission.

*2. Searches made before 10/1/2019 will not count towards mission 3. You will not be able to use a tablet, computer, Microsoft Edge App, or Xbox One console to complete this mission. There are 4 total weeks. Week 1 ends 10/8/19, week 2 ends 10/15/19, and week 3 ends 10/22/19 and week 4 ends 10/29/19; each ending at 12:00AM PT.

*3. Points earned before 10/1/19 will not count towards mission 4.

*4. You will not be able to complete this mission on your computer, tablet, or smartphone.

*5. You will not be able to complete this mission on your computer, tablet, or smartphone. There are 4 total weeks. Week 1 ends 10/8/19, week 2 ends 10/15/19, and week 3 ends 10/22/19 and week 4 ends 10/29/19; each ending at 12:00AM PT.