Context: I help run servers for a small multiplayer game, and a persistent troll has been targeting us and other active servers for months. This mostly consists of fairly low-bandwidth reflective attacks abusing protocols like NTP. They've also abused Oracle's free tier to generate larger attacks.
AWS offers their Shield product, although your requirement of "reasonably priced" may exclude AWS in general https://aws.amazon.com/shield/ .
Cloudflare Spectrum can protect TCP/UDP services including games, they actually call out Minecraft specifically. https://www.cloudflare.com/products/cloudflare-spectrum/mine...