What are some alternatives?
When comparing Overtone - Gaming Comunication and PlayOnLinux, you can also consider the following products
Goldberg Emulator - Steam emulator that emulates steam online features.
Proton - Compatibility tool for Steam Play based on Wine and additional components
VMware Fusion - Simple and powerful virtual machine for Mac. Mac virtualization software. Learn more about VMware Fusion and try it free today.
CrossOver - Don't buy a Windows license, don't reboot and don't use a Virtual Machine. Try a free trial of CrossOver to run your Windows software on Mac, Linux and Chrome OS.
Wine - Open Source Software for running Windows applications on other operating systems.
Fluid - Turn Your Favorite Web Apps into Real Mac Apps.