Firstly, I don't remember half the games I've played recently, just been throwing everything at myself
The ones that spring to my mind are:
Grand Theft Auto IV
Platform: Playstation 3, Xbox 360
Availability: Worldwide
Pricing: ~£40
Genre: Blow shit up
I don't think I need to give a description of this game, if I don't your just not cool, so no description here, other than well, it's another awesome GTA game.
Verdict: Buy this game if you have had any interest in previous GTA games
TrackMania Nations/United Forever
Platform: PC / Steam
Availability: Worldwide
Pricing: Free / £20
Genre: Time Attack Racing
Ok, Nations is a FREE game on steam, TrackMania is a racer, go play it

Anyway, Nations and United share an online mode, which involves the art of beating other peoples cars around crazy courses with loops and overbanked turns, in your F1 looking car. It supports a stupid number like 40 players on a single track at a time, and as such there is NO COLLISIONS, but that doesn't matter as your 5 minutes of flipping off that same corner cause you forget there's a brake. United, costs money and adds a single player, and I believe more cars for the online (therefore there is a United only part of online, but they play together for the F1 cars), I'm not sure it is worth the $40 off steam, I haven't bought it
Verdict: Nations is free, go grab it. I'm undecided about purchasing United myself, we'll see
I Wanna Be The Guy
Platform: PC
Availability:
Online
Pricing: Free
Genre: Evil Platformer
This is one of those evil trial and error platformers you should have heard about. There you are, navigating a hard section of moving lifts around spikes, dodging randomly falling spikes, you think you've made it, and then... BAM, the floor falls through and you get hit by a plane (actually happens). If you have issues with getting angry with games, this will either fix that issue of drive you insane and probably cost you about £800
Day Of Defeat: Source (New Beta)
Everyone who visits this site knows this game, I've just decided to play DoDs again, just in time for the New Beta incorporating some little tweaks and a new map, although there seems to be a few more maps than last time I played this game... oh and I really suck now