Firaxis just announced a new addition to the XCOM series in the form of XCOM: Chimera Squad. It takes place 5 years after the events of XCOM 2 and focuses on a specific squad of named human and alien characters trying to maintain the peace in a one of the new cities.

Game Reveal Trailer

Gameplay Trailer

It's currently $10 on steam, presumably since it looks like it was built on the XCOM 2 engine. The sale lasts until May 1st, so you'll have time to wait until some reviews are out before you buy it.

I absolutely loved XCOM 2: War of the Chosen, so this is a nice surprise for me. Some of my friend who have played some of the older XCOMs are comparing it at least thematically to XCOM: Apocalypse

Edit:
@cwagner provided a link to GMG where its currently $9.50

Kickstarter

Demo (via GOG)

Xenonauts 2 is a sequel to 2014's Xenonauts, a turn-based tactics game inspired by the original Xcom games.

I've never played the older games but I'm in love with the Xcom reboots, so I'm definitely keeping a close eye on his one. Any other Xcom fans here?