Cosplay is a well-established gaming tradition, and you clearly don’t have a proper gaming expo unless you can attract a Commander Shepherd or Chell impersonator. Note: bonus points are also given if Chell carries a meticulously detailed Portal gun.

At this year’s Eurogamer Expo, cosplayers came out in force. We definitely noticed an increase in dressed-up gamers compared to previous years, and the quality seemed better too.

We photographed some of the best over the past few days and uploaded them into a neat gallery below for your viewing pleasure.

On the first day of Eurogamer Expo 2011, thousands of gamers packed into Earls Court to sample the biggest upcoming games and listen to some of the biggest developers in the world. We were only able to see a glimpse of what the expo has to offer but we did get some time with PS Vita, Battlefield 3 and Uncharted 3.

Here are some thoughts from today’s conferences.

We have now reached the final entry in our ‘20 Days of PSN’. It’s a journey that began with survival horror title Siren: Blood Curse and featured many gems along the way, such as Limbo, Braid and WipEout HD. In at #2 came Q-Games’ physics-based puzzler PixelJunk Shooter, and it takes something special to out-do that. So without further ado, let’s introduce Flower, the best of PSN.

Tomorrow sees the end of our ’20 Days of PSN’ feature. Tune in then to discover the best PSN game, but today we can reveal the next best thing. It’s the marvellous PixelJunk Shooter from Q-Games. Read on to find out what makes PixelJunk Shooter worthy of such a lofty position.

Video game royalty makes its presence felt at #6 with the incredibly refreshing, Lara Croft and the Guardian of Light.

Braid was finally released on the PlayStation Network nearly two years ago, and it remains one of the most unique and best games on the service, due to its ingenious gameplay, beautiful presentation, and ambiguous multi-layered story.

Read on to find out why Braid is #7 in our Top 20 PSN titles…

If you were a fan of action/adventure or platformer games on the PS2, the chances are you played Jak & Daxter and Ratchet & Clank. However, one game you probably didn’t play was 2003’s Beyond Good & Evil, which despite being very well received by critics, was a commercial failure.

Luckily, Ubisoft has given all of us who missed it the first time around a second chance to experience it, in the form of Beyond Good & Evil HD, which features updated visuals and PSN trophies, and is available for a ridiculously low price.

Read on to find out why Beyond Good & Evil HD is #8 in our Top 20 PSN titles…

Super Stardust HD blasts in at #9 in our ‘20 Days of PSN’. This glorious twin-stick asteroid shooter is Housemarque’s second entry in our list, after Dead Nation came in at #13, proving that they really are one of PSN’s best developers. Read on to find out what makes Super Stardust HD so special.

Believe it or not, we have now reached the halfway point in our 20 Days of PSN feature. Taking the #10 spot is Limbo, a unique adventure through a strange and unforgiving world.

Read on to find out why Limbo is #10 in our Top 20 PSN titles…

Of all the game genres to have benefited from the advent of downloadable titles on the PS3, tower defense games have experienced the greatest growth in the digital realm.

Any and all discussions concerning the tower defense experience on the PSN begin and end with Q-Game’s visually tranquil yet subtly complex, PixelJunk Monsters (PJM).

Fat Princess rolls in at #12 in our ’20 Days of PSN’. What is it about this particular title that launched it, probably via a catapult, ahead of other great PSN games such as Warhawk and Dead Nation?

Read on and find out why it is finally possible to have your cake and eat it. And eat more. Go on – have another slice…

Housemarque’s Dead Nation clocks in at #13 in our countdown of the top 20 PSN games. Read on to find out what separates this Z-Day shooter from the rest.

When it comes to pinball games, Zen Studios is the champion. First the development studio brought us creative tables that delved into the depths of our imagination with Zen Pinball. What originally started as four tables soon evolved to 11, including tribute tables to popular franchises such as Street Fighter and Ninja Gaiden.

Then in 2010, they kicked it up a notch and released Marvel Pinball; a collection of tables devoted solely to our favorite superheroes. Who doesn’t like Blade, Iron Man, Spider-Man and Wolverine? Marvel Pinball essentially revitalized the pinball genre and brought it to a whole new audience.

For this reason, we have selected Marvel Pinball as our #14 pick in PS3 Attitude’s Top 20 PSN titles.

Here at PS3 Attitude, we’re celebrating our ’20 Days of PSN’. Coming in at number 15 – Warhawk.

Released back in 2007, Warhawk was a re-imagining of a game brought to the PlayStation in 1995. Crafted with a great deal of skill by the people at Incognito Entertainment, Warhawk has gone on to become one of the most loved PSN titles ever.

Avast ye, me hearties! At PS3 Attitude, we’re celebrating the PlayStation Network with our ’20 Days of PSN’ feature, and coming in at number 16 is Monkey Island 2 Special Edition: LeChuck’s Revenge.

Monkey Island 2 was released in 1991 with more characters, puzzles, islands and dialogue than Secret of Monkey Island. It’s the strongest of the series and possibly the greatest graphic adventure ever. PSN has the essential 2010 Special Edition, which is the best version available.

Read on to find out why Monkey Island 2 is #16 in our Top 20 PSN titles…

Frankly, we don’t really have to tell you much about Shatter in that you already know it’s a fantastic game. We gave the title a glowing review and its soundtrack even made the cut for the top 7 PS3 soundtracks. That’s how good Shatter is. It should come as no surprise then that it makes #17 on our Top 20 PSN titles.

Read on to find out why Shatter is #17 in our Top 20 PSN titles…

This is a movie tie-in game with a difference. Based off the film which was in turn, based off a series of graphic novels by Bryan Lee O’Malley, you play as Scott Pilgrim, fighting for the right to date Ramona Flowers by defeating all 7 of her evil ex-boyfriends. And thats pretty much all the story you get, although that’s really all the story you need.

While zombies and a haunted village are good and all, they pale in comparison to knights in shining armor, four knights as a matter of fact. Castle Crashers invaded the PlayStation Network nearly two years after their Xbox 360 counterpart but it was definitely worth the wait for fans The Behemoth.

Set in a fictional medieval universe, an evil wizard bent of world domination has stolen your castle’s magical crystal and four princesses. As a knight, it’s your duty to rescue the damsels in distress, defeat the wizard, and restore peace throughout the kingdom.

Read on to find out why Castle Crashers is #19 in our Top 20 PSN titles…

The Men’s Health Survival of the Fittest 10k adventure race is getting closer, and I’m working extra hard to raise donations for GamesAid by taking part in this monumental challenge!

With just a quarter of a year to go until the big day, it’s that time when I deliver my weekly Training Journal to keep you all up-to-speed on what I’m doing and how I’m getting on. Read on to find out what I’ve been up to this week…