If you want a laptop that can play current games (with decent-good detail), then $1100 is about the starting point. HOWEVER, if you are talking about playing older games like Warcraft, CSS, HL2, then most current gen laptops in the $450-600 range will do.
As a web and word document laptop, $450 is fine but not for gaming laptop unless you're going to get it used. Your going to need like $600+ to have a laptop with dedicated graphics and a cpu powerful enough to run it.
Intel® Core™2 Duo Processor T6600 (2.20GHz, 2MB L2, 800MHz FSB)
Genuine Windows® 7 Home Premium 32-bit
Fusion Finish™ with Breeze Pattern in Graphite Gray with Silver Keyboard
Microsoft® Office Ready with Microsoft Office Professional 2007 60-day Trial Edition
2GB DDR2 memory (2048MBx1)
ATI MOBILITY RADEON™ H4570 with 512MB DDR3 discrete graphics
160GB HDD (5400rpm, Serial-ATA)
DVD SuperMulti (+/-R double layer) drive
Realtek® 802.11b/g/n wireless LAN
Lithium Ion battery (6-Cell, 4000mAh)
1 Year Standard Limited Warranty
Laptop Price as Configured: $623.00
Accessories Total: $0.00
Your Total: $623.00
This will run most games (i think) at moderate resolutions and settings.
Well that clears a lot of thing up! without knowing the currency or country we normally have to guess the US.
With that all cleared up, i have found a laptop that's £50 over your asking price but it the cheapest laptop that can handle game decently.