I was actually trying to locate the BurgerTime clone we're discussing here by using Google Image search, but instead found this blog about retro(ish) games. And within it there's an entry about an Indie game called Rogue Shooter.
Essentially, it's a sci-fi themed first-person roguelike which apparently runs on a Wolfenstein 3-D-like 2.5D engine - or a careful imitation thereof. At any rate, it's got the 90 degree walls of the majority of pre-Doom first-person games. Visually and thematically Rogue Shooter can be compared to Blake Stone to a certain extent, while gameplay- and level design-wise it seems to resemble Corridor 7. But Rogue Shooter stands on its own merit, and after watching this video review that shows some rather extensive gameplay I got the impression that the game is quite nicely done.
[Edit] Another nice review video.