Surprise rules in D&D 2024: Disadvantage on initiative instead of a lost turn
In the 2024 rules a surprised creature does not lose its first turn. It rolls initiative with Disadvantage, and that is the whole penalty. An ambusher who is Hidden when initiative is rolled has the Invisible condition, which gives Advantage on the roll, so a well-placed ambush usually means the attackers act first. But a surprised creature that rolls well still acts before them and can take Reactions from the start. Here is what that changes about designing and placing an ambush.
· 5 min read · TerrainTale
What is the 2024 surprise rule?
When combat starts, the DM decides whether anyone is surprised, typically a creature that did not notice the threat before the fight began. A surprised combatant has Disadvantage on its Initiative roll. Nothing else happens to it: it takes its turn normally when its count comes up, it can move and act, and it can use a Reaction at any time, including before its first turn.
The 2014 rule was harsher. A surprised creature could not move or take an action on its first turn and could not take reactions until that turn ended. An ambush in 2014 was a free round; in 2024 it is a better chance of going first. Groups converting old adventures should expect ambush encounters to be less lopsided than they were written to be.
How Hide and Invisible feed into initiative
The 2024 Hide action is a DC 15 Dexterity (Stealth) check made while Heavily Obscured or behind Three-Quarters or Total Cover, and out of any enemy's line of sight. On a success you have the Invisible condition, and the total of your check becomes the DC for a Wisdom (Perception) check to find you. The 2024 Invisible condition has a line about surprise: if you are Invisible when you roll initiative, you have Advantage on the roll.
So a good ambush stacks both. Hidden attackers roll with Advantage, and surprised defenders roll with Disadvantage. The odds tilt heavily, but not completely, which is the point.
- Hidden ambusher: Invisible, Advantage on initiative.
- Surprised defender: Disadvantage on initiative.
- Features like Alert (proficiency bonus added to initiative) and the 2024 Assassin's Advantage on initiative still apply.
- The 2014 Alert feat stopped you being surprised; the 2024 version does not, but adds its bonus to the roll.
Where does an ambusher have to stand?
Out of every target's line of sight, behind Three-Quarters or Total Cover or inside Heavy Obscurement. On a map that means the ambusher's square must have something solid between it and the road: a low wall, a thick tree, a boulder, the corner of a building or the inside of a dark doorway. A goblin standing in the open at the edge of a clearing cannot hide, whatever it rolls.
It also has to stay that way until initiative is rolled. Most tables treat the moment the first ambusher springs as the moment initiative is rolled, before the attack itself. Each hidden ambusher then keeps Invisible until it makes an attack roll, casts a spell, makes a loud noise, or an enemy finds it, so the first shot from hiding is also made with Advantage.
Designing ambushes for the new rule
Because a surprised creature still acts, the first round is a race, not a gift. Spread the ambushers so the defenders cannot reach them all on their first turn, and give each one a reason to stay hidden: high ground on a bank, a hedge with a gap in it, a wagon to fight from. Place them where their first attack lands before anyone can close the distance, around 30 to 60 feet from the road for archers.
Plan the reverse too. A party that ambushes monsters gets the same edge and the same limits. If the rogue scouts ahead and the party sets up behind cover, every hidden character rolls with Advantage, and the bandits who did not notice them roll with Disadvantage.
Running the moment at the table
Decide who is surprised before anyone rolls, and say it. Compare each ambusher's Stealth total with each target's Passive Perception if you want a rule-of-thumb method; a target that beats every ambusher's total is not surprised. Then roll initiative with the Advantage and Disadvantage marked, and run the fight from there.
On a battle map, place the hidden minis before the session and reveal them when initiative is rolled. Our guide on setting up an ambush with hidden minis covers the mechanics of hiding tokens so players do not see the trap before it springs.