So i have to say that I love this as it is, the fact that so many people are scared of tarrasques is in all honesty justified.

From beginning to end you can do so much with this add what you like take ourt what you like and then to have them see how bad things can be is great can i give it 6 stars? i wish i could, i have even modified this into my own one shot that i have ran many times that people love to play in.

Just ran this module for my husband's level 20 party. The fight against two supercharged tarrasques in the streets of my settings largest city (super easy to reflavor) was amazing.

The final boss fight took a lot of time to set up and was over in less than one round, but the rest of the module was great.

It was easy to adapt the module's monsters to new environments, loved most of the weird tarrasque modifiers.

Some of the modifiers are far less relevant at level 20, like the one that lets it create a bunch of CR 1 monsters or the one that disolves mundane weapons.

But the ones that gave the tarrasques neat AOE abilities or other ranged attacks were a lot of fun to combine and add on.

I have run this three times now and it's awesome. Ran it for my regular gaming group of adults who have gamed forever, new player adults and also my 12 year old kids. Loved by every single group. Super gonzo fun that you can ramp up or down to meet your tables play style. James is a great designer and it shows in this adventure.

Each time I have added a skill challenge / montage to the scene of dashing from the Open Lords office to the first of the portals. Also created a novel salute for the smoke eaters each time and made in compulsory for the players to use at the table when interacting with them - Call (usually Dorabeth) - Smoke Eaters! Response - What ho Dragon-o! thump heart twice with fist

Very good one shot, i dont like the very much the gathering allies part, players offten feel confused if they just joined for the one shot. Tho the rest is very nice.

Ran as a power-trip one shot over the holidays with my roommates. If you want to laugh maniacally for four hours straight while all of your friends die in a wicked blaze of glory, buy this module. Jump straight into chapter two for maximum effect. LEAN INTO THE CHAOS and dont take yourself too seriously. 5 stars. 10/10, deeply satisfying and unapologetically wish-fulfilling.

Our group skipped the entire first section and jumped straight into Tarrasques in the city. I definitely suggest doing that if you're putting this into a custom campaign or as a one shot.

This can be a fantastic adventure under the right circumstances, but it'll take a little work to shine without a very specific group.

SPOILERS FOLLOW.

The adventure basically falls into three distinct acts. The first is the discovery that multiple tarrasques are about to attack the city, and the players are expected to prepare by calling various factions to arms. The second is a battle against tarrasque, made easier or more difficult by their success in the first part. The third act is a fight against a familiar archnemesis and another tarrasque.

The first act is written with the assumption that you and the group are familiar with Waterdeep and various factions within. There's a great deal written here that will work swimmingly for a group that has finished a Waterdeep campaign, but if the group is familiar with any other big city (and has friends and factions they can call on to defend the city), there's a framework to adapt it. It's a pretty fantastic framework to add as much (or as little) high-stakes rollplaying as your group cares for. Unfortunately, if you're running this as a one shot outside a campaign, most groups will have little direction on what to do in this act.

The second act is going to be a long combat, with a few ideas for complications thrown in. If you're running a high-level campaign, you're probably aware that combat can be a long slow slog, with groups very differently optimized for it; and a tarrasque can absorb a lot of hits. Here's another place you might need to adapt: because of the amount of resistances and immunities a tarrasque has, you might find one or two arcane spellcasters have nothing to do. It's really fun and funny the first time a spell bounces off a tarrasque. By round four or five, you've potentially got someone who has spent an hour feeling useless. Take a look at the combat complications that are suggested, and give them something to do while the physical fighters wail away. (Although a tarrasque is also immune to nonmagic weapons, that shouldn't be an issue at level 20.) On the flip side, a spellcaster witht he right spells prepared could be an annihilation machine. That's just the nature of level 20 adventures though!

The third act is another combat, with another Tarrasque and The Big Bad, and although there are ways to end it other than just killing The Big Bad (assumed to be Halaster Blackcloak but easily replaced with another spellcasting archvillain), rolling initiative again right after another combat started to feel a little one-note to me. I think there was a missed opportunity to add more of an exploration challenge here, to balance the social first act and epic combat second act. Admittedly, that might miss the point of a silly gonzo action adventure, and a bloodthirsty group that is enjoying the handfuls of dice they get at level 20 will probably love it as-is. But I think you could turn a good adventure great, if you put a puzzle or two between the party and the final battle. (Lucky for me, we broke this into two sessions when I ran it, breaking between the second and third acts. This gave me time to embellish the third act, and I'm glad I did.)

Lest this sound overly negative: writing tier 4 adventures is difficult if you know a group, and almost impossible for a general audience. There are fantastic bones here and nobody's going to hand you a level 20 adventure that works for any and every group without a little adaptation. If you're looking for a fun epilogue to a campaign that ended at level 20, this is hard to beat.

The adventure was very over the top, and the first time me and my players fought a Tarrasque. Overall I really liked the adventure. The only problems I found: 1) too many pages on the first chapter, most groups will jump ahead to the next chapters that are the meat of the adventure 2) There is very little information on Falx. Moreover, the maps there have no scale and I have no idea what was the intended size for the top of the tower 3) The battle with the wizard was completely lackluster. Without legendary actions and rolling bad on iniciative, the party killed him on the first round of combat by focusing fire on him.

What matters the most, though, is that we had a lot of fun. Now I just need to find an even bigger treat to the players!

This is a silly, over-the-top idea that makes little sense from a strict campaign standpoint - I mean, an army of Tarrasques leveling Waterdeep a la Pacific Rim? But it is what it purports to be, and my players and I had a great time playing through it. If you're in a destructive mood, this should fit the bill.

Need to fill in a session, or just want to do something crazy? This is the most fun you can have without being arrested. I ran this to fill in a campaign session that had players missing. Let's just say that the players who missed out are extremely jealous. If you want to know what you'll get, just look at the cover. It's a simple,, no frills, straight to the action adventure that will put those level 20s through their paces.

Bring a mop!

WOW what a bananas adventure! I ran this as a live streamed game for my YouTube show Mistress of Modules and it was FANTASTIC! I was absolutely scared to run such a high level adventure (especially as a one shot), but the way James formatted this adventure and the precisely necessary nature of his writing made the experiene an absolutele joy. 'Invasion from the Planet of Tarrasques' has all the fun flavor of a Godzilla blockbuster, lots of relatable nods to the lore of Waterdeep, and so many deliciously tense moments built in. I cannot recommend picking up this adventure enough.

Another grand slam from Introcaso!

I hate adventures that are heavy. Something that's so thick with slog that the players get bored halfway through the night. Running an adventure full of the highest CR creature in the game sounds like a slog.

And yet, here it works. Exceptionally well. By using a variety of narrative devices based on the allies the players have collected at this point, the plot doesn't slow down. The combat feels appropriately epic with lots of environmental effects going on. It feels like you're battling a giant Kaiju.

The third stage could go poorly if your players act stupidly or just figure a physical confrontation can solve any problem. But at my table, this went swimmingly.

I haven't ran this adventure yet, but it reads and looks fantastic! The player decisions at the beginning, and the added randomness of the environment during the final battle, means this adventure could be different each time you run it. Well done!