We haven't heard a whole lot about Singapore's DARPA-esque TechX robot challenge since it first kicked off early last year, but with the final round getting underway on Sunday, Popular Mechanics has now thankfully offered up a preview of what's in store. Among those set to compete is the so-called Uni-Seeker bot (pictured above) from Nanyang Technological University, which is a heavily modded incarnation of iRobot's ATRV Junior robot, and one of only six bots that managed to make it through all the qualifying rounds. Others include the considerably more intimidating AZROBOWAR Sharp Shooter, built completely from scratch, and a pair of robots built on iRobot's popular PackBot platform. From the looks of it, they'll each have their work cut out for them in the big event, with them required to start outside and navigate their way inside a building, then climb a flight of stairs, travel up an elevator, touch a few targets, and then exit the building again -- without any human intervention, and in less than an hour. That $700,000 prize should provide plenty of motivation, though.

New Optimus Aux shots show a sexier vision