Going through my games, I've got another few to recommend....
Blacksite - Got this recently and it's a fairly decent FPS...feels a bit last-gen, but for the money it's good. It's basically a sequel to
Area 51...
Ninja Blade - Only paid 79p for this!

It's a bit like
Ninja Gaiden 2, and has some pretty cool bosses...it does have a lot of Quick Time Event gameplay though, and some of the platformy bits can be frustrating,so it's not for everyone..but it's at least worth a fiver!
Lost Planet - Another pretty decent game...you stomp around a snowy landscape in mech-suits killing big bug-type aliens and snow pirates! That is pretty much it, but I think it's alright!
Stranglehold - The game sequel to the film
Hard Boiled!

It's a pretty funky third-person shooter, and sliding about tables and running up bannisters popping caps in the baddies is a right laugh!