At this point you might be expecting a moan about the quality of the games or the visuals, but nothing could be further from the truth. Sure, InstantAction isn't going to give us the next Gears of War or Gran Turismo 5, but what games there are, are surprisingly polished and make effective use of the Torque engine's advanced lighting, texture mapping and shader processing capabilities. The games look good enough not to horrify an audience familiar with modern console games, without excluding anyone through huge downloads or high system requirements. Better still, these are games designed to be enjoyed by a wide audience - they're easy to pick up, accessible and immediately fun.
The pick of the bunch at the moment is Marble Blast Online. For those of you who haven't played it, it's a marble-rolling arcade puzzle game in the vein of Super Monkey Ball or Marble Madness, with a range of tricky courses dotted with power-ups that you'll need to use wisely to get through them, and crystals which you'll need to collect. You can enjoy it as a single-player game if you want, but - as you can guess from the word Online - it also features a fun multiplayer mode where you battle other marbles to collect the most crystals on each map. It looks good. It plays well. It's fun.
My second choice is ThinkTanks, another old Garage Games favourite given an InstantAction spin. It's basically a simple tank-based shooter with deathmatch and capture the flag modes, where you trundle over a bumpy little world blasting your enemies and helping your friends win the game. Solid handling and physics and a strong range of power-ups add to the fun, and you can choose from a selection of tanks offering different combinations of manoeuvrability, firepower and armour. ThinkTanks has a nice line in cute cartoon graphics and it's easy to pick up and play, making it a real contender if you fancy a quick blast.
Finally, I'd have to go for Rokkitball. Imagine a weird combination of Basketball, Quake and the old classic Speedball, where our futuristic players are packing jet-packs and rocket launchers. It takes a little practice, but the principles are easy enough to grasp and the action is furious and enjoyable.
Several other games are also trialling on the service at the moment, including Cyclomite, an interesting action puzzle game, Zero All Productivity (love the name), a 2D multiplayer shoot-em-up that plays a little like Time Pilot meets Geometry Wars, and Screwjumper, a weird futuristic base-jumping game where you dive down a vertical tunnel crashing into glowing green objects while avoiding those of other colours. These games don't feel quite as fully-formed yet, but we're still talking early stages at the moment.