Hammer work is amazing. The puzzle has way too much going on though. I had no idea the section at 4:30 in the playthrough was even there The office section was a good puzzle just by itself. Adding that much fire made it hard to see, and hard to navigate.

Im sorry bro i have no clue after the third floor of the burning office

I actually skipped some of the fire sections near the end: at about 4:44 in the linked video, look up through a gap in the ceiling to shoot the the ceiling tile. After putting out the fire, link to the adjacent surface to get there.

Have no idea what do do once I reach the burning office. I head through but can't go anywhere. The only other path inside kills me with invisible fire instantly.

A LOT of work put into this, it was fun, a bit different. But the constant warnings were a bit annoying, also I would prefer to not have any oxygen bar at all. I see no reason for it.

Cool map but thank god the computer was wrong about the meltdown.

The Hammer work in this is fantastic, but unfortunately I found it difficult to locate portalable surfaces due to the extensive particle effects. The final room is gorgeous, and the oxygen mechanic was a nice touch to add tension.

Very difficult but satisfying, just got to explore but you will get it. Also WOW! I thought nothing would top the visuals in part 3, but I think one more part topped this one.

Super difficult absolute work of art. I've been looking for very advanced maps and I found them in this series. Great job.

Oxygen?

Wow! excellent map, once I discovered how to get around - fire extinguisher was good! Thanks!

Well this was...different, I wasn't expecting the series to turn into a game about escaping a burning building. It looks really ambitious and for what one can do with the Portal 2 authoring tools, I think you've done a great job. Even the fire extinguishing mechanic feels much better than in the previous part. So well done, and thumbs up!

the level was fun, sure, but the constant warnings of a nuclear meltdown were incredibly annoying

Nice adventureous level

on one of the monitors in the last room is a monitor listing areas and displaying a (i think) binary security code at area 219.32... does it translate to something?

Good job with the optimization though. I know a few pc's aren't gonna handle this but I didn't experience any fps drops. Amazing job!

Glados on Part 3: This is fine
Glados on Part 4: wHaT hAs hE DoNe tO My fAcILiTy?!

Nice oxygen counter!

Wow, I am amazed to say the least.Outstanding job, especially on that monitor room. that looked really good.

Honestly wow, visuals are nearly completely perfect and are 100% outstanding to say the least. It looks absolutely amazing. My one suggestion is to try maybe something else rather than a huge white skybox, maybe use the orange fogged one that's used in the campaign or make your own, I see the entire space you've set up there as potential to be flawlessly epic if that were added. Alas, suggestions aside this was incredible to play and I loved every bit of it. Just outstanding work.

9.9999/10

It's almost magical how you managed to get this map running on a computer! Pretty good experience. Died to invisible flames a bit more than I wanted to. But generally, it was fun

Yeah, I got turned around and lost multiple times, suffocated a few times too. Still, it wa fun exploring. Thanks for creating.

Less fire would be great. I can't play this one with my 1 gen old video card

Waiting for part 5

That was amazing. Once again, excellent puzzle and a beautiful map!

Wow, what a huge map. Very fun and intense. A bit too much "find the portal surface" for my tastes, but still a lot of fun and more interesting than the average BTS map. Thumbs up.

I got about a 1/4 of the way through and then totally lost. Thanks for the walkthrough.

wow crazy ,very tricky map. waiting to go into his LAIR haha

Waiting for part 5)

this map is a pleasure !

Very cool map as the previous!
Just a thing about cubemaps which are too reflective to my taste, glasses are like mirrors!

With maps this large and detailed, you need to create line of sight loading areas.