Probably the closest we'll get to Portal 3. Overall, a wonderfully satisfying mod.
Weak points of this mod:
- The story is very thin. Don't expect the carefully-planned plot of Portal 1 or 2. It sets the premise but that's about it. It's almost entirely superfluous. The ending is almost nonsensical, but in the end, it's about as sensible as the rest of what passes for a plot. Fortunately, the point of this mod isn't the story.
- It is also quite short. Expect about 1 hour play time. That's understandable, considering the small number of people who made this. But I really enjoyed it, so 9 levels aren't enough!
- The progression of difficulty is a bit out-of-order. The hardest level was about half-way through (level 6, I think), and thereafter things seemed to get easier. But maybe that was just my learning curve.
Strong points of this mod:
- This mod is well made, especially considering the small number of people behind it. The visual style is very nice--it is unique to the mod, but based heavily on Portal 2's graphics, so you still feel that you're in a different section of the same game. Everything is so shiny and smooth! The sound clips and so on are pretty much all from Portal 2 as well. I had no problem with glitchy graphics.
- The time machine mechanism is explained nicely with computer screens that have Bendy demonstrating various skills. Much like the original Portal, the first several chambers are very helpful in building up your skills for the harder levels later on. This is a very useful way of teaching how to use the time machine without changing the feel of Portal too much, because, unlike cube- and button-based testing, it's not at all obvious from the get-go.
- The actual mechanism of the time machine is *very* fun. I feel that it wasn't utilised to its full extent here--there is a lot more that could be done with it. But most of the chambers have multiple solutions, all requiring use of the time machine, so you can play to your strengths and figure things out in a variety of ways.
- Level design is very nice. As in Portal, the early levels make it fairly clear what needs solving, but later ones become more open-ended. Every level has been designed with the time machine strongly in mind. It's quite impressive, when you consider the potential complexity given by the time machine.
- It's free!
Considering the price ($0), this is definitely worth playing. I would absolutely recommend it as a fun mini-continuation of Portal 2. The graphics, mechanism, and level design are all at a very high standard, higher than most games that cost actual money.