
2 Cents On The Portal Thing
A few years ago, I was part of the
Dare to be Digital competition, in which students are locked in a room for 8 weeks and told to make a game.
We based our game on one mechanic - a gun that could give objects magnetic charge. Shoot one robot with positive charge, and another with negative charge and they'd swoop towards each other and explode in the middle.
some posters from the game that explain the gameplay and a screenshot
We decided it was to be a first-person action-puzzle game, and began the design process. Now, after early testing, it turned out solving puzzles in three dimensions is difficult and confusing. It needs to be extremely clear what you can interact with and how. In game terms this means that the non-interactable game environment has to be fairly nondescript, and the interesting stuff has to stand out. In Portal, this meant pristine lab environments, color coding the portals, drawing lines from buttons to doors, and so on. It's a real abstraction of an environment to suit the gameplay, and it's extremely functional.
When we came to develop our visual style, we realised that the 1950s aesthetic we were planned needed to be scaled back. There's no room for potted plants, secretaries desks and typewriters in the areas where the physical gameplay is occurring (although, like portal 2, you can put them in areas without puzzles), and when gameplay gets serious, you can't have distracting colours and patterns covering the walls. We decided that if a static object was to be magnetizable, it'd be bright yellow and chrome. These objects needed to be everywhere, so they became the fans and vents of the ventilation system. Part of the gameplay involved combining objects of the same size to make a bigger object, so these sizes were also colour coded (small = purple, medium = green, large = orange).
We also found that our expansive multi-stage puzzles fell apart in practise unless they were rigidly compartmentalized. Thus, we started putting in doors that blocked progress until each puzzle section was completed. The environment needed to become arbitrary, homogenous, it was the only way that these odd environment elements made sense. Where portal had decided on a famously-meta interpretation of a lab environment, we went for a factory on security lockdown, and hoped the player would suspend their disbelief.
The moral of the story is - by the end of the day we had something that on a surface level shared many similarities to Portal, despite arriving at each design decision from first principles. It's a testament to the design of their game. To share a familiar quote
"Perfection in design is not achieved when there is nothing more to add, but when there is nothing more to remove." and that's why Portal 1 is held in such high esteem.
When we were nearing the end of our development, we realised the similarities of our game, and had to make a strange decision. Would we take steps to distance ourselves from Portal, knowing that it meant taking the 'wrong' decision in gameplay terms? We seriously considered moving the game to 3rd-person even though it would make it harder to solve some of the puzzles. The magnetic charge was shown by objects glowing red or blue, as that's what we and players expected - but portal had blue and orange portals. Should we change it to glowing white and black? We decided not to, and I'm glad we didn't, and although we went on to win the audience vote, we perhaps deservedly had our share of criticism for the similarities.
In conclusion, I'd defend the developer of this game, because a lot of the re-trodden ground is likely done so because it is the 'right' choice in response to a gameplay problem. There may be creative solutions out there to avoid similarities, and perhaps it's worth looking for them, of course. It's certainly the case that producing a first-person action puzzler funnels you down a certain path, where the similarities are much more peculiar than the similarities when making a Gears/CoD clone.
I also bristle at your suggestion, Zwiffle, that gameplay is "untouched" when the Portal developer swapped out the core mechanic. You have to design completely new gameplay, and a completely new set of puzzles! It's not easy to create a satisfying puzzle dynamic with a nice difficulty curve in the FPS environment, and if she succeeds in making a compelling game with her new mechanic, then it wasn't easy, it's a great achievement.