
✓ Both are first-person shooters — sharing shooter, first-person shooting and precision platforming
≠ Its own twist: puzzle design, adventure storytelling and ranged combat, while skipping skill tree progression
Portal 2 is a first-person puzzle game developed by Valve Corporation and released on April 19, 2011 on Steam, PS3 and Xbox 360. It was published by Valve Corporation in digital form and by Electronic Arts in physical form.
Where it drifts furthest from Contra: Operation Galuga: visuals.
It predates Contra: Operation Galuga by 13 years, with what that implies technically.











