Reviews have been pretty good for this modern heir to the classic X-Wing vs. TIE Fighter.
Other free PC games (select "Games with Prime" tab) are available on Prime Gaming in October, including:
Ends 10/18. PlayStation Store has Mortal Kombat 11: Ultimate Edition (PlayStation 4 and PlayStation 5) on sale for $21 downloaded. Includes Kombat Pack 1 and 2, Aftermath Expansion and Shao Kahn.
AT&T has the SteelSeries Nimbus+ Bluetooth Wireless iOS iPadOS tvOS Gaming Controller with iPhone Mount for $45 with free shipping. Normally $70.
Daily Steals has the new WarioWare: Get It Together! (Nintendo Switch) for $47 - extra $7 off with code ADSWARIO at checkout = $40 with free shipping.