If you really need to go with a laptop rather than a desktop, be prepared to empty your wallet.
Both the kid and I recently purchased new gaming laptops. Aidan bought his for gaming and I got mine for the processing power in order to render 4K videos faster.
He has the Acer Predator 17 which features an Intel Core i7-6700HQ Processor (2.60GHz), 16 GB RAM, Nvidia GeForce GTX 1070 8G RAM video card with a 17" HD (1920x1080 resolution) monitor for £1,800. He can play the game flawlessly at full resolution.
I have the Lenovo Ideapad Y700 fully loaded with an Intel Core i7-6700HQ Processor (2.60GHz), 16 GB RAM, Nvidia GeForce GTX 960M 4G RAM video card with a 17" UHD (3840x2160 resolution) monitor for £2,100. I paid more because I have a touch screen in addition to the UHD resolution and I have a 512GB SSD hard drive as well as a 1TB 5400 RPM secondary hard drive. The kid only has a 1TB hard drive and a non-touch screen. The game won't play at my monitor's full UHD resolution, but does at standard HD resolution. However it doesn't play as well as it does on Aidan's due to his better GFX card.
For that kind of money you can buy a better quality desktop as well as a laptop that will suffice for work, so a few questions to ask:
1, Do you have that kind of dosh?
In other words, can you afford to pay that much for a laptop that is capable of running the game properly?
2, Will you be playing the game anywhere other than at home?
If not, it might be best to get a desktop for gaming and a laptop for work.
3, Will you continue playing PC games in the future?
If you are, you should go with the gaming desktop over the laptop. Upgrading the desktop for future game requirements in much cheaper than purchasing a new gaming laptop, as laptops cannot be easily upgraded.