Gaming laptop on short budget

Something like Aspire V5-552G-X852 would be good, but that is a US model so I'm not sure if it is available in Australia. I'll just list out guidelines, it's quite difficult finding laptops in other regions.

CPU: AMD is a budget and low voltage oriented CPU, while Intel is performance oriented and can hurt the wallet. Look for an i5 in Intel and an A8 or A10 in AMD. Make sure the Intel is 4th generation (an example of an i5 would be i5-4200m) so that your battery life won't suffer. Intel also offers low voltage CPUs, they end with "u" in the name, for example there is i5-4200u and i7-4500u.

GPU: There is integrated and dedicated. Integrated would be something Intel HD or AMD 8001g/d, if it ends in "m" there's a 90% chance it's dedicated. Integrated graphics nowadays are powerful, but not as good as dedicated. When it comes to integrated AMD has the more powerful cards, so stick to that if you want integrated. Integrated is good for light gaming and battery preservation, the higher the number the better. Dedicated graphics come in 2 brands, AMD and Nvidia. Nvidia is performance oriented and more costly, while AMD is more budget oriented. Finding AMD dedicated mobile graphics is like finding a shoe in a haystack, you'll come across it eventually but it won't be too easy. I'd recommend to stick with Nvidia. You want to look for a 735m/740m/750m/755m. The 745m and lower than 735m should be avoided, anything above 745m is out of your price range. You can compare these by searching "card a vs card b game-debate" that site will give you a percentage.

RAM: This handles temporary storage, if you're a multitasker you'll want 6-8gb of this, 8gb is this year's standard while 16gb is this year's newer standard. I often find myself using 3gb-5gb while playing minecraft and other games, so 8gb is a must when doing moderate-heavy gaming.

Screen resolution: 1366x768 (768p) is very common on budget laptops, this is the lowest HD resolution you'll find and would suffice but it won't look to pretty. 1920x1080 (1080p) is soon to be the standard and looks nice, but it requires better graphics to run games with, and more VRAM (video ram, shared with CPU if integrated or on card if dedicated) as well. You'll find most cards have 1GB or 2GB of VRAM, 2GB is good for 1080p while 1GB is good for 768p. Don't worry about the VRAM too much, and don't worry about GDDR3/5, that's not too important.

Brand: Probably the most important aspect, I recommend avoiding Toshiba (bad build quality, little support options). Go for Lenovo, Asus, and Samsung. Hp seems to be doing better, and Acer seems to be trying to catch up, but their support is lacking, more Acer than HP. Keep in mind, that Chinese brands (Lenovo) can be better than American brands, Taiwanese (Asus) brands too. Don't be afraid to look at Sager, MSI, etc. either because they can have some good devices.

Hopefully those guidelines help you, I'd try to search but It's difficult to find Aussie retailers, if you were in the UK it'd be much easier.