edit: Now available on the NZ (cobalt) and Australian sites (race the sun) in English! expiring 1st of march see here:
https://www.ozbargain.com.au/node/435790
Cobalt (expiring some time on the 1st of Feb see below) and Race the sun is now available (expiring November 16th some time see below) via Microsoft Korea store(Microsoft.com)
https://www.xbox.com/ko-kr/live/games-with-gold?xr=accountpo…
https://www.microsoft.com/ko-kr/p/cobalt/bss424n935ks?active…
https://www.microsoft.com/ko-kr/p/race-the-sun/bs32dzlxbq02?…
Race the sun also on Japan site:
https://www.microsoft.com/ja-jp/p/race-the-sun/bs32dzlxbq02?…
*use google chrome to auto translate the page, but still take care not to "purchase" but to "get" as the translations are not perfect and if you have already got the game you will be offered to buy to own and only press once as it may not show as ready to install until later or after you go searching in the store app of your Xbox one, where it should say "install".
*also sometimes the "get" option doesn't appear recently, keep reloading or try a different browser (i used edge for cobalt) and copy Korean text into google translate by hand
BTW Bloodstained: Curse of the Moon and Assassin's creed rogue have been available since this morning for those with expiring gold subscriptions! see Brandogs' (and thanks) listing for the Feb games with gold US list and links (Bloodstained: Curse of the Moon is available via US site see his link below as it's not available to Australian users (you can't get it via your console), at least not yet, when they update games with gold pages we will see if there are any alternative game/s for us and other countries.
https://www.ozbargain.com.au/node/435263
edit:* Assassin's creed rogue microsoft link isn't working yet, try the xbox marketplace link below
https://marketplace.xbox.com/en-AU/Product/Assassins-Creed-R…
For those that don't know, the games tend to expire after the last country ticks over to the 1st of the month or the 16th of the month, and they are made available to "get" in the store before the first country hits the 1st or 16th of the month which means there is over 24hrs of overlap. So, for example, if you have a 1 month voucher or trial and you activate it on the 1st or 16th Melbourne time but it's still the 31st or 15th Los Angeles time (don't wait too late but also don't be early) you can "get" the 2 expiring games , the 2 new games and the 1 holdover game straight away via the store, then you get 2 more game in 15 days and then another 2 on your last day but don't leave it too long always check the store listing for each game never wait for the games with gold links to change, so this gets you 9 games, plus any extra games offered in other countries stores.
Bonus possible Errors: 48 hour codes can "get" you Xbox one games with gold, confirmed in august by me, hopefully still going, possible only some codes? earliest google result December 2017, definitely didn't work before. Someone says they could get Xbox 360 games with some effort, but I couldn't/didn't.
Link appears to take you to the Japanese store (or at least, that's where it takes me?), rather than the Korean store.
But I just went direct to the Korean store and searched for it:
https://www.microsoft.com/ko-kr/p/cobalt/bss424n935ks
And link for Race The Sun:
https://www.microsoft.com/ja-jp/p/race-the-sun/bs32dzlxbq02
Cheers!