It's consistently impressive how many small game developer studios with meager budgets and limited resources are cranking out such awesome games. Some of the most intriguing and innovative titles to launch this year hailed from the indie scene, and there's a lot of good stuff cooking just below the radar. Looking ahead at 2012 and beyond, quite a few sexy indie games are on the horizon for the PC. Here are five gems you don't want to miss out on when they launch.How can you not get excited about the prospect of strapping into the cockpit of a hulking battle robot and slugging it out across a post-apocalyptic sci-fi planetscape ravaged by war? It's been awhile since we've had our mech-fetish fantasies properly fulfilled, and Hawken is shaping up to be the just the game to put some serious rise in our armor-plated Levi's. Billed as a mech combat first-person shooter, this multiplayer-focused game puts a more streamlined, fast-paced spin on heavy robot warfare. Daddy likes.Hawken's ultra detailed cockpit HUDs and thundering sound effects deliver the satisfying heft of thumping around in a big metal death machine, but the punchy gameplay doesn't get too bogged down in simulation. These mechs can zip around fast when they need to, and much of the action takes places in the skies as you riddle opponents with bullets and send volleys of rockets up their tailpipe. Think Halo instead of MechWarrior, and you get the gist of the upbeat, strategic pacing the developers are going for.What's most impressive about this ambitious game is how amazing it looks. Indie titles often get a rap for leaning heavily on retro or simplistic graphic styles, but Hawken rivals some of the best work cranked out by large AAA teams. Considering Adhesive Games is only a small studio, the jaw dropping combat environments and attention to realistic details is a sight to behold. This one has a ways to go until release, but shoving spoonfuls of fiery hell down opponents' throats with giant mounted robo-guns is going to be a real trip when this baby launches. It should be interesting to see what other game modes are woven into the mix as well as any possible single-player components.If you grew up with fond memories of clocking an absurd number of hours in classic PC dungeon crawlers like Eye of the Beholder or Dungeon Master, then gazing deeply into the oh-so-shiny alpha footage of Legend of Grimrock should rock your dice-rolling, graph paper-doodling world. The folks over at Almost Human Ltd . are reaching deep into the way back machine and pulling out nugget after nugget of sheer nerdy gold for their new indie studio's debut project. From the looks of it, the core foundation of this first-person dungeon crawling RPG is as deliciously old-school as it gets, but modern visual flourishes make the familiar blend of subterranean adventure more than just a mere throwback to the days of yore.Your band of adventurers starts off imprisoned in the deep labyrinth beneath the nefarious Mt. Grimrock, and the step-by-step trek to escape through winding corridors and deadly chambers pits you against all manner of traps and evil beasties alike. Each of your four party members can be customized with combinations of different classes and races. Feel like making a minotaur wizard or a lizardman thief? You can totally do that. Gear you've picked up can be dragged and drop between characters' inventories, and there's an abundance of weapons and secret goodies to uncover. Throw in a ton of monsters to slay, loot to score, and a cool rune-based spell system, and it's dungeon thrashing time. Here's to what's shaping up to be a slick revival of an oft-neglected gaming genre.After crafting the critically acclaimed and thought-provoking indie hit Braid, Jonathan Blow is hard at work with a new team putting together a gaming project that will test your mind in very different ways. At a quick glance, The Witness evokes fond memories of wrestling through brain-bending challenges in the classic Myst, but this first-person puzzle adventure if far more open and atmospheric. Waking up alone on a mysterious island with no recollection of how you got there, you set out to explore the curious island settlement that's brimming with technology and infrastructure but no other signs of human life.The curiosity to learn more about your uninhabited surroundings, how you got there, and how you can escape drives the adventure. Uncovering voice recordings left by the island's creator offers some clues, and intuitively interacting with and studying your surroundings mixes with the game's unusual puzzle elements. Blue computer panels are scattered around the island's seven main areas, and each holds a maze-puzzle to solve. These seemingly simplistic conundrums are often tied to the world around them, requiring careful scrutiny and examination of each area in order to complete them. The final game will have over 350 puzzles, and they're grouped into different themes connected to the areas you find them in.Even with placeholder graphics, The Witness delivers a captivating world to roam about in, and the intrigue that surrounds the place is part of the allure. With all the main puzzle elements in place, Blow has beefed up his crew to rework the game world and add more polish to the overall design in preparation for the game's launch sometime next year. Watch for some big, brain-boggling things from this ambitious puzzle effort.