Another option, IF you are PC Hardware knowledgeable, is to build a gaming PC to your own personal specifications, then turn it into a Hackintosh.
Many MacOS enthusiasts that are game players have done this. I built my Hackintosh for other uses than games.
Here’s my Specs:
[Built December, 2018]
Profile: iMac 18,3. (5K Retina, 27" 2017)
i7 7700K 4.2GHz, 4c/8t.
Gigabyte GA-H270-HD3 MOBO
32GB Corsair Vengeance LPX DDR4-CL14 2400MHz RAM - (4x 8GB Sticks)
Fenvi FV-T919 WiFi-AC & Bluetooth 4 PCI-e x1 Card.
Silverstone FS303B 3-Bay Hot Swap Bay.
(Bay-1) - Samsung VNAND 860 Pro 1TB SSD - High Sierra 10.13.6 - (17G11023),
(APFS), w/Web Driver 3188.8.131.52.40.134 & CUDA Driver 418.163.
(Bay-2) - Samsung VNAND 860 Pro 1TB SSD - Win 7 Pro SP-1 x64 w/NVIDIA
(WHQL) Driver 388.13.
(Bay-3) - Western Digital Black SATA 2TB HD - MacOS Time Machine/Games - (HFS+), 1TB Each Partition.
One MacVidCards’ GTX-1070 8GB GDDR5 VRAM - Low Power - (one 8 Pin Connector)
One EVGA GTX-1050 2GB GDDR5 VRAM.
SabreNT USB Audio.
Rosewill, NightHawk-117, E-ATX Case.
Corsair HX750i Platinum 750 Watt PSU.
UNITEK 10-Port USB 3.0 Hub.
ASUS VE278 27" Monitor on HDMI on GTX-1070.
Altec Lansing 45 2.1 Speaker Set.
Logitech M510 Cordless Mouse.
MacAlly iKey5 Full Sized Keyboard with 10-Key.
Logitech Extreme3DPro USB Joystick.
I use this System as my daily driver. I use the two NVIDIA GPUs for Scientific Number Crunching at SETI@Home. (CUDA90 App.)
Here, I play StarCraft:Remastered. (Single Player.) I also play some GOG . com games.
IF you choose the Hackintosh route, keep in mind that my hardware has already been discontinued. (CPU and MOBO.) So, you’d need to consider 9th or 10th Generation Intel Hardware. (My System is 7th Generation, i7.)
My System cost me about $3K. I saved for most of a year, buying parts one and two at a time. By the end of December, 2018 I had everything I needed to complete the System.
The i9 9900K is quite a powerful CPU and makes a fantastic Hackintosh. With an AMD/ATI GPU, (at least a Sapphire Radeon Pulse RX-580 8GB GPU), you can run Mojave or Catalina. (Mojave is easier to build a Hackintosh with, then you can Upgrade to Catalina IF you choose.)
IF you are an NVIDIA fan, you MUST stick with High Sierra 10.13.6 AND make use of Web Drivers for the 10x0 Pascal Card Lineup.
Options, options, options…