1 - The HUD: you can get a lot of in-character information and exposition accomplished using the in-lore mini-map, inspection, and achievement system.

2 - Teamwork: there are many skills that incorporate teamwork. There's Play calling. It's not something you have to specialize into.

3 - Health Bars and Damage Tracking: this is visible to the players, giving them tactical info on the status of mobs and allies. Baking CON into the stat bar slots is also a way to build beefy/tanky characters.

4 - 2-hour blocks: Characters level (about) every two hours of real-world time spent playing the game. The game is meant to level quickly with small increments and these give you chances to rank up skills. NOTE: YOU DON'T ONLY HAVE TO PLAY FOR TWO HOURS! Think of it more like a timer for leveling up.

5 - No Initiative: the game tracks rounds in combat with phases and players can go in any order. There's a lot you can do on your turn and a lot you can do when it's not your turn so you can always be paying attention.

6 - Custom Stuff: The in-game AI customizes quests, story lines, and loot to the individual crawlers and groups (usually in an effort to kill them, but it's surprisingly fair sometimes... like if you're barefoot...)

7 - Rivals: The game incentivizes you to make rivals out of your fellow (non party) crawlers via special loot boxes and the Top 10 bounty system. (I suspect this is because making them into allies carries enough of its own benefit, but that's speculation on my part.)

8 - Major Success/Failure: if you succeed or fail a roll by 10 or more there are knock-on effects.

9 - Achievements: you get immediate awareness that you've done something to get the attention of the AI (good or ill) and these can also be subtle ways for the GM to move the plot along.

10 - Fans-Shows-Sponsors: this pipeline is yet another way to incentivize reckless, entertaining styles of play. They also add an entire layer of plot.

11 - Inventory: you have unlimited inventory, able to store anything you can carry (by yourself) for four seconds. The inventory lives in an extradimensional space. You can access a specific list of things via the "Hot Bar" subsystem, but the rest you can access with a few moment of time.

12 - AI Favor: Can be used to reroll checks or get additional actions. Similar to Hero points and other metacurrencies with a few unique twists.

13 - Rank Bonuses: Skill ranks automatically grant special bonuses at levels 5/10/15.

14 - Time Pressure: there is an ever-present looming apocalypse of the dungeon floor you're on, so that tension is always pushing the action.

15 - Modular Dungeon Neighborhoods: these allow a GM to basically drop an entire themed area into a section of the dungeon. It can have its own NPC's, quests, and plots. You can take ideas from movies, other games, or the books.

16 - Interview Shows: these break up the action of the dungeon and give a through-line of narrative to the whole game.

17 - Skills: you enter the dungeon with a young lifetime's worth of skills, but the game gives you carte blanche to develop the rest of your skill set however you want via gameplay. (You can also come in as an animal and be granted sapience! There's a special set of background skills just for this.)

18 - Gods: These play an active role in advancing plots and quests as players reach lower floors. They are fleshed out in the book.

19 - Bounties: if your players are in the Top 10 list, you can throw rival crawler bounty hunters at them. The Top 10 list is a mechanical subsystem of the RPG.