Milo, a round-based WWII horde shooter from solo developer Spencer Sharp (rat cream games), went into Steam Early Access on PC on 29 Oct, the date on its Steam page. It's published by Brisbane-based Yarrawah Interactive, which announced the launch in a press release on Games Press.
Per the release, you can play solo or in one to four player online or LAN co-op, with more than 12 WWII weapons, and it's built in Unreal Engine 5. Yarrawah says Milo should stay in Early Access for about two years and that the price will go up after Early Access ends.
As of 30 Oct, Steam lists Milo at US$19.99 · A$28.30.
Sources: Games Press · Steam · Milo official site