If game lags in you low-pc and laptop - Open file %AppData%\Local\Opera\Saved\Config\WindowsNoEditor\GameUserSettings.ini and paste here:
[ScalabilityGroups]
sg.ResolutionQuality=75.000000
sg.ViewDistanceQuality=0
sg.AntiAliasingQuality=1
sg.ShadowQuality=2
sg.PostProcessQuality=2
sg.TextureQuality=0
sg.EffectsQuality=0
sg.FoliageQuality=0
[/script/engine.gameusersettings]
bUseVSync=False
bUseDynamicResolution=true
ResolutionSizeX=1280
ResolutionSizeY=720
LastUserConfirmedResolutionSizeX=1280
LastUserConfirmedResolutionSizeY=720
WindowPosX=-1
WindowPosY=-1
FullscreenMode=1
LastConfirmedFullscreenMode=1
PreferredFullscreenMode=0
Version=5
AudioQualityLevel=0
FrameRateLimit=60.000000
DesiredScreenWidth=1280
bUseDesiredScreenHeight=False
DesiredScreenHeight=720
LastRecommendedScreenWidth=-1.000000
LastRecommendedScreenHeight=-1.000000
LastCPUBenchmarkResult=-1.000000
LastGPUBenchmarkResult=-1.000000
LastGPUBenchmarkMultiplier=1.000000
bUseHDRDisplayOutput=False
HDRDisplayOutputNits=0
Have fun and plaing Demo!