Portal

Portal traps you inside a sealed research complex filled with white test rooms, mechanical doors, and a trophy placed out of reach. Across 30 chambers, you move deeper into the lab with a handheld portal gun that links two flat surfaces. Step through one gate and come out of the other. Use that link to cross gaps, reach high ledges, and slip past security systems. Some rooms block the way with weighted switches, moving lifts, and puzzle devices that need a storage cube in the right spot. Other chambers force you past sentry fire, energy barriers, or laser hazards. A few tests also use momentum. Drop from height, carry your speed through a portal, and fly farther than a normal jump allows. The lab doesn't give many answers. Push through the chambers, grab the gold cup in each room, and search for a way past the experiment itself.

How to play?

Scan the room before firing. Flat walls, floors, and ceilings can hold your two linked shots. Line up the reticle, place one portal, then place the second on another surface. Walk in, then watch where the exit sends you. Drag cubes across the chamber and set them on floor buttons. That powers lifts or unlocks the next route. If a platform sits too far away, climb higher and drop into a portal. The stored speed carries you across long gaps. Use the skip button in the upper-right corner if a test room stalls your progress.