good cheap steam games

As mentioned in a previous post, i only have a laptop (and a bad one at that) I have, however, just ordered a new gaming PC. after spending £800+ on a PC, i'm a little tight for cash, but i still want some good games.
What are some good steam games that are free or under £10?

this one has a lot of good reviews, haven't tried it
Defense Grid: The Awakening

fred ez said:

this one has a lot of good reviews, haven't tried it
Defense Grid: The Awakening

Thanks, I'll give it a go.

Dude said:

Battlefield BC2, 4.99 on steam

I can vouch for that too, it's awesome.

Also Cities: Skylines is on sale on Steam, really really good city-planner/builder game. And don't just be on Steam, GoG is just as good - if not better - than Steam because they have a DRM-free policy on games they offer.

Dude said:

Battlefield BC2, 4.99 on steam

Already played it on xbox, was great but i don't think it's worth getting on PC aswell

Faith said:

I can vouch for that too, it's awesome.

Also Cities: Skylines is on sale on Steam, really really good city-planner/builder game. And don't just be on Steam, GoG is just as good - if not better - than Steam because they have a DRM-free policy on games they offer.

Yeah i do use gog but it's just that i've got a steam voucher to spend