In essence M1918 BAR's meaner big brother with a prison record, the Gatling Gun is one of the best weapon assets in AHLCG. As it stands, I would say it's a game changer. My thoughts are in a few sections below:

Pros:

• Able to deal 6 damage in a single action, which is unrivalled across all weapon assets. A fair number of Elite enemies have 3 health, so these can be killed in a single action – tremendously valuable.
• Can have a staggering +6 on attacks, largely negating the need for other boosters or skills to commit.
• Starts with a good amount of uses. For example if just dealing two damage per action and so using two ammo, you could take 6 shots before needing to reload.
• Can kill groups of enemies, which is a massive boon for action economy.

Cons:

• When facing large groups of enemies (especially swarm enemies) the difficulty for the fight action can become very high.
• Failure on 6 ammo tests is punishing, as it wastes a lot of resources.
• If you're using multiple ammo on tests regularly, you need ammo support events in your deck.
• Sits in the class, and so is inaccessible for Guardians.
• The 5 resource price tag is on the costly side.

Deckbuilding Tips:

• Ammo support is almost certainly needed to keep you testing at high values. In this regard cards such as Contraband, Swift Reload and the off-class Extra Ammunition are all worth a mention. Contraband in particular doubles ammo on an asset.
• Tutoring cards can be beneficial to find it fast. Backpack •• does a deep deck search while also finding Supply ammo cards such as Contraband and Extra Ammunition. The off-class Prepared for the Worst is a good level 0 option for further tutoring. Underworld Market (even with the taboo) and Dirty Deeds present alternatives.
• Heavy Furs as well as the off-class Custom Modifications (EDIT: Strong-Armed doesn't work here) can all help against bag chaos bag pulls and so wasting large amounts of ammo.
• Cards such as Crack Shot which offer large boosts for when you're facing off against big groups of enemies can be useful.
• Healthy resource economy to afford the gun plus ammo support makes sense, such as Faustian Bargain, Bank Job, "Watch this!" and Easy Mark.
• Extra actions from Leo De Luca and Haste substantially increase damage output as long as you have enough ammo remaining.

Investigator Pairings:

• Tony Morgan was made for Gatling Gun. He has a of 5, is able to access Guardian cards such as Extra Ammunition and Prepared for the Worst, and often gains an extra action from Bounty Contracts.
• Michael McGlen similarly has a of 5 and "Viola" Case to find it, however you will need to manage Confiscation as this leads to Gatling Gun being reshuffled and so losing excess ammo. Friends in Low Places can be used to draw Confiscation early with a small gun in play and so get it discarded.
• Finn Edwards (depicted in the artwork) is a reasonable fit and he has Smuggled Goods as a tutor card for both the gun and support cards like Contraband. Dirty Fighting and Finn's free evade mean he can test at the same levels as Tony when the enemy is exhausted.
• "Skids" O'Toole has Guardian access and so can make use of many cards which work well with Gatling Gun, plus he can buy an extra action when needed.

Overall Gatling Gun is a very powerful card if properly supported, combining a massive boost with very high damage and the ability to kill groups of enemies like the Flamethrower. I'm not sure if it will remain un-tabooed for long, currently 5 XP is well worth the price of admission. I posted a Tony deck with Gatling Gun just before this review, so feel free to check it out for inspiration.

They were so careful with the limitations they put on Protective Incantation ("Group limit 2 copies of Protective Incantation in play.") and The Chthonian Stone/The Chthonian Stone (being unique) and then they print THIS?! I can even replenish this with Uncage the Soul!

With changes like these you can really see they want the game to go in a different direction.

EDIT - explanation: I indeed think this card is too powerful, especially with interactions like Akachi Onyele and Uncage the Soul, and that is also what the direction the game moves into is: Power creep, as what happends to every expandable card game at some point. With cards like this I just think it's becoming more and more obvious.

Until you realize the auto-fail is also a symbol this sounds like an amazingly good card. The insanely increased odds to just fail the test, no matter how many Ritual Candles you pack, make this card hard to play, I'd argue.

But who knows, maybe you don't wanna pass the test (survivor tech, anyone?), or just fire Agatha Crane's ability, or have Seal of the Seventh Sign out (although it won't last long if you play this card)...

EDIT - Fun fact: In theory, you could be stuck in an endless loop if you put Katarina Sojka together with Seal of the Seventh Sign and people sealing the other symbols via Protective Incantation, The Chthonian Stone, The Chthonian Stone, Bulwark, Crystalline Elder Sign, Day of Reckoning, Dial of Ancients, Serpents of Yig, Sign of Xelotaph, The Codex of Ages, and/or Unrelenting. This is also a great example why knowledge should be made easily accessible to the players in any game - because I am not even sure if being stuck in an endless loop counts as "having the potential to change the game state" and therefore would allow triggering Katarina's reaction ability or not. Yeah, the chaos bag is not endless, but it is at least undefined, if not an unreachable state. So what happens when you do this?

Another rogue card that got a huge glow up when Scarlet Keys and Hemlock Vale re-wrote the whole Rogue playbook.

Up to three moves as a free action is a potentially crazy power level for a level zero card. People run Shortcut to move once. People run Scout Ahead to move three times, but that costs actions and resources. (Both those cards do have other utility, which helps them earn their spots).

But as the esteemed Snacc noted when this card was released, Nimble's value is very situational unless you put some work into unlocking it. By default, the only way to intentionally start an agility test is to evade an enemy. Moving away after an evade can occasionally be a really good effect. But often enemies engage me while I'm at a location I still need to interact with, so I'm not interested in moving immediately. Also, opportunities to take 2-3 moves at once for real value are uncommon in most scenarios, and waiting for an enemy to spawn at the right time isn't reliable.

(All the same problems apply to Agility treacheries)

These days, though, you can investigate with Thieves' Kit or Forensic Kit and use this to zoom around on your own time. (Investigate a location with no clues on it if you have to). We can murder someone with a British Bull Dog and zoom away from the scene of the crime. Or Grift an aloof enemy before doing the same. This card is also the best argument I can find for actually using the Bolstering upgrade on Friends in Low Places, which will give it a wild icon letting you commit it to anything.

Some interesting or high-value Tactic events I came across:

• First Watch: Such a good card. To play it each round is bonkers.

• Counterpunch: This is one of the no-brainers and probably the intended use of the Book. Don't waste precious actions on enemies, just play this.

• Ambush: Before grabbing enemies via "Where's the party?" or Kicking the Hornet's Nest during your turn.

• Dynamite Blast: If you have enough resources, this could be strong.

• Barricade: For sticky situations where you want to get rid of engaged enemies or some effect causes enemies to move during the investigation phase. Basically just to circumvent the forced effect.

• Hiding Spot: Since this card has no play instructions you can play it during ANY player window and your whole group benefits from its effects during the complete investigation phase. Next turn, repeat.

• Hit and Run: I am sure with a bit of theorycrafting you will find sweet combos via recurring this. Dunno, maybe Charlie Kane with Summoned Hound or The Red-Gloved Man? Or tarot plays with Anna Kaslow? Or Library Docent to replace your empty Book (if you have another Tome in your hand).

• In the Shadows: As long as you don't have to kill enemies it's great to be invisible all the time without having to rely on crazy deck-cycling builds. Additionally, Trish Scarborough actually has great access to secret replenishment to get even more out of the Book. Needs Versatile, though.

• On the Lam: My personal favorite. I built a whole deck around playing it each turn and eventually blasting the horde you gathered via "Where's the party?" and Kicking the Hornet's Nest with Dynamite Blast and Stir the Pot

• Additionally, you can combo the Book with Crystallizer of Dreams, which feels wow :)

There is Making Preparations, but Dilemmas are not played, so this doesn't work (also for this card, it wouldn't make sense to recur it).

It's funny that a lot of Tactics let you either avoid enemies or rough them up real good. Then again, it's sort of in the name.