Christmas escape games online, with hints instead of a stolen answer key
These are timed rooms and short missions, not the hidden-object browser game and not a boxed murder kit. Escape rates below come from one collection page.
People who type "with answers" usually want the next click. I can point at where those clicks are written down. I will not paste another site's solution into this page. The video on this page is a full Adventure Escape: Christmas Killer walkthrough uploaded 18 Dec 2021 by EscapeGamesWalkthrough. Written companions from the same cluster are AppUnwrapper, Room Escape Walkthroughs, and AppGamer. Use those if you are stuck in that app. The app itself is a store download, so it is not a browser room.
Browser rooms and the rates one site publishes
Melting-Mindz keeps a Christmas and holiday escape collection and prints an escape rate next to several rooms. On the pass I recorded, Sneaky Christmas Escape showed 96 percent from 15 recorded escapes, Abandoned Christmas Escape 84 percent from 12, Christmas Gift Room Escape 100 percent, Escape Christmas Eve 64 percent, Escape Christmas Cabin 78 percent, and Christmas Lodge Escape 100 percent. Those percentages are that site's own counter. I do not have a second site publishing the same counters, so the status of each figure is one source. The collection also has a walkthrough channel if you want their hints rather than mine.
Short missions with a printed duration
Escape the Crate's free mini-mission Escape Christmas Past is described on their Christmas page as 10–20 minutes, paper and pencil, aimed at families and new players, and playable online. KraftyLab's free Christmas escape room article describes five original puzzles, about 15 minutes, and says it can be played on a phone, over Zoom, or printed, with hints if you stall. I am not reproducing KraftyLab's puzzles. The duration and the hint policy are the facts I needed.
playit-online, KBHGames, and Lagged have each hosted a Christmas Room Escape associated with Room's Room. I treat that as one room with three possible doors, not three different plots.
If you would rather build the room in your house
A browser room and a living-room room are different jobs. Clues, a timeline, and props for a home build are on the DIY escape page, and printable cards are on escape-room clues.
Questions
Where are the answers for Christmas Killer?
The embedded video is a full walkthrough. Written versions live on AppUnwrapper, Room Escape Walkthroughs, and AppGamer. This page does not transcribe them.
Are the escape percentages official?
They are the numbers printed on the Melting-Mindz collection. I have one source for those counters, so I am not calling them an industry average.