Slow gaming on macbook air playing spec-ops the line

[somename]

Have tried rebooting SMC.

Have checked the console and activity monitor. A few bits on the monitor but only up to 2%.

No other applications running during play.

I have 40 GB available space on the HD.

My Mac:
Model: MacBookAir6,2, BootROM MBA61.0099.B18, 2 processors, Intel Core i7, 1.7 GHz, 8 GB, SMC 2.13f15
Graphics: Intel HD Graphics 5000, Intel HD Graphics 5000, Built-In
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x117), Broadcom BCM43xx 1.0 (7.15.159.13.12)
Bluetooth: Version 4.3.2f6 15235, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: APPLE SSD SD0256F, 251 GB
USB Device: Internal Memory Card Reader
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Air, Apple Inc., 23.6

 

[pigoo3]

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