Tri, the game where you do more with a few triangles than you ever expected. Given the texts, screenshots and Portal comparisons one may expect a game of similar challenges but different tools (triangles instead of portals). Given the success of Portal this is fair enough but I want to take the time where Tri goes above and beyond the expectations of a "Portal with triangles". 1. Compared to Portal, Tri is very non linear. Instead of working from puzzle to puzzle and room to room you have to consider the whole 3-dimensional construct of the level. You are usually free to choose which of the statues to collect first and there are multiple solutions to many puzzles. 2. The Tri is so much more powerful than the portal gun. You can fill the Level with insane numbers of triangles and create elaborate constructs to achieve your goals. The limitation of the portal gun limited the possible solutions. The Tri allows you to achieve anything thinkable... and the game requires you to think it. 3. While Portal is already known for requiring a lot of 3-dimensional thinking Tri pushes this to a whole new level. You don't just have to consider position and momentum in 3D-space you need to consider the level in many wildly rotated states to think your way to the harder to reach places. Tri requires you to truly change your perspective. 4. Again contrary to Portal this game offers so much to do beyond completing the levels. In Tri there are so many Idols to find in the most unimaginable and unreachable places. Often you wonder if it is at all possible to reach a certain spot ... and when you finally do there is an Idol waiting. Someone actually expected you to get there! To appreciate the true genius of the level design you must push yourself to collect as many idols as you can. Now don't get me wrong, I'm not trying to say that Portal is a worse game than Tri. It's just that Tri has unique qualities that can't be underappreciated.