'Portal Reloaded' Review: An Ingenious Twist On Valve's Classic With Tightly Designed Puzzles And Interconnected Levels

Innovative puzzle mechanic where you hop between contained worlds to solve challenges

Tightly designed puzzles with excellent difficulty curve that constantly evolves

Clever interconnected level design keeps things interesting throughout

Simple controls and minimalist presentation create highly focused experience

Intriguing sci-fi setting and soundtrack, though story leaves some questions