I'm not sure if this game is good or terrible, but I'm playing it. The core gameplay actually feels pretty nice if you grew up on Unreal Tournament/Quake. The portal mechanics are sort of like the logical conclusion to UT's Translocator 10 years after the release of Portal. I'm not very good at setting them up, but using your own portals to shoot "through" walls is pretty fun. The rest of the game feels really rushed and lacks polish. The maps are pretty average. The guns noticeably lack the feedback from the classic Quake/UT games. The pistol is waaaay too strong for a default weapon. The plasma rifle is total dogshit.