Rules of the Game - All About Trip Attacks

Sometimes a foe (or unruly ally) becomes much easier to handle when lying on the ground. Fortunately, the rules provide a method for knocking creatures off their feet -- the trip special attack.


For more on tripping, you might also consult the recent Tactics & Tips (Sibling Rivalry column).


Tripping usually doesn't pose many problems in play; however, tripping involves an opposed roll. Tripping also involves a few modifiers not typically used in combat. The rules for trip attacks can prove complex enough to give anyone pause from time to time. This series considers the theory behind the trip attack, examines the process used to resolve trip attacks, and considers a few variations on the trip attack.



Here are a few key terms used in this series.

Attack of Opportunity: A melee attack that a creature makes during another creature's turn when a foe does something to provoke it. See pages 137-138 in the Player's Handbook and Rules of the Game: All About Attacks of Opportunity for details.

From page 135 of the Player's Handbook: 

ATTACKS OF OPPORTUNITY
During combat, you threaten all squares adjacent to yours, even when it's not your turn. An opponent that takes certain actions while in a threatened square provokes an attack of opportunity from you. An attack of opportunity is a free melee attack that does not use up any of your actions. You can make one attack of opportunity per round. Actions that provoke attacks of opportunity include moving (except as noted below), casting a spell, and attacking with a ranged weapon.

You provoke an attack of opportunity when you move out of a threatened square, except:

• If you withdraw (a full-round action), opponents don't get attacks of opportunity when you move from your initial square. If you move into another threatened square, however, opponents get attacks of opportunity when you leave that square.

• If your entire move for the round is 5 feet (a 5-foot step), opponents don't get attacks of opportunity when you move.


Opposed Check: A check whose success or failure depends on another check, usually from a foe. The two check results are compared, and the higher check result wins the opposed check. If the two check results are tied, the character with the higher check modifier wins the opposed check. If both the check modifiers are tied as well, reroll to resolve the opposed check. Continue rerolling as often as you must to determine who wins the opposed check.

Prone: A creature lying on the ground is prone. When prone, you cannot make ranged attacks with weapons (except for crossbows) and you suffer a -4 penalty on melee attacks. If you're attacked while prone, you gain a +4 bonus to Armor Class against ranged attacks but take a -4 penalty to Armor Class against melee attacks. See Part Two for more notes about being prone.


TRIP
You can try to trip an opponent as an unarmed melee attack. You can only trip an opponent who is one size category larger than you, the same size, or smaller.

Making a Trip Attack: Make an unarmed melee touch attack against your target. This provokes an attack of opportunity from your target as normal for unarmed attacks.

If your attack succeeds, make a Strength check opposed by the defender's Dexterity or Strength check (whichever ability score has the higher modifier). A combatant gets a +4 bonus for every size category he is larger than Medium or a -4 penalty for every size category he is smaller than Medium. The defender gets a +4 bonus on his check if he has more than two legs or is otherwise more stable than a normal humanoid (such as a dwarf ). If you win, you trip the defender. If you lose, the defender may immediately react and make a Strength check opposed by your Dexterity or Strength check to try to trip you.

Avoiding Attacks of Opportunity: If you have the Improved Trip feat, or if you are tripping with a weapon (see below), you don't provoke an attack of opportunity for making a trip attack.

Being Tripped (Prone): A tripped character is prone (see Table 8-6: Armor Class Modifiers). Standing up is a move action.

Tripping a Mounted Opponent: You may make a trip attack against a mounted opponent. The defender may make a Ride check in place of his Dexterity or Strength check. If you succeed, you pull the rider from his mount.

Tripping with a Weapon: Some weapons, including the spiked chain, dire flail, heavy flail, light flail, guisarme, halberd, and whip, can be used to make trip attacks. In this case, you make a melee touch attack with the weapon instead of an unarmed melee touch attack, and you don't provoke an attack of opportunity. If you are tripped during your own trip attempt, you can drop the weapon to avoid being tripped.



The rules don't spend much time explaining what a trip attack looks like in the game world. Fortunately, it's not too difficult to read what the rules have to say about trip attacks and form a picture from that.

You can make a trip attack against any corporeal creature that is standing more or less upright (more about this in Part Two) whether that creature is moving or standing still. A trip attack starts like a grapple attack -- you attempt to physically attack your foe with an unarmed melee touch attack. Instead of trying to hold on, however, you try to push or pull your foe off his feet and make him fall down. You also can use a trip attack to pull a foe off a mount.

In older versions of the game, what we call a trip attack now was called an overbearing attack. The term "overbear," however, implies that you tackle your foe and fall to the ground with him, and that's not the case with a trip attack. You remain upright even if your trip attack succeeds in forcing your foe prone.

Here's an overview of the rules for tripping:

• You make a trip attack in lieu of a melee attack.

You can trip using the attack action or using the full attack action. You also can make a trip attack as an attack of opportunity.

If you use the full attack action to trip a foe and your base attack bonus allows you to make multiple attacks during your turn, you can use the extra attacks to beat up the foe you've just tripped. If you do that, your foe's reduced Armor Class (from being prone) is a benefit for you. (You also can use your extra attacks against other foes if you want.)

If you have the Improved Trip feat, you can immediately make a free melee attack against a foe you have tripped.

• You can attempt a trip attack against a foe one size category bigger than you, the same size as you, or smaller than you.

You can't trip a foe two or more size categories bigger than you -- you just can't force a creature that much bigger than you off its feet.

• You begin a trip attack with an unarmed melee touch attack.

The rules don't come right out and say it, but you use your melee touch attack to get a purchase on your foe (so you can throw, push, or pull him down). The melee touch attack provokes an attack of opportunity from your foe.

If you wield the right kind of weapon, you can use it for the touch attack and avoid the attack of opportunity.

If you have the Improved Trip feat, a melee touch attack you make to trip a foe doesn't provoke an attack of opportunity.

Curiously enough, your trip attack isn't spoiled if the attack of opportunity you provoke when you initiate the attack deals you damage (as it does if you attempt to grapple a foe; see page 156 in the Player's Handbook). Resolve the attack of opportunity (if any) you provoke before completing your trip attack. If you're still alive and conscious after the attack of opportunity, you can proceed to the next step.

• After you've made a successful melee touch attack, you make an opposed Strength check to pull (or push) your foe off his feet.

Your foe resists your Strength check with either a Strength check or a Dexterity check (whichever gives the foe a higher modifier for the opposed check).

The check you make as the attacker is part of the action you used to make the trip attack. The check the defender makes isn't an action for the defender.

Several modifiers apply to the opposed check you make to resolve a trip attack. Size has a big effect on trip attacks. (The bigger creatures can force other creatures off their feet more easily and also have an easier time resisting attempts to force them down.) Each combatant gains a +4 bonus for each size category he is larger than Medium and a -4 penalty for each size category smaller than Medium. Part Two includes a table that summarizes size modifiers for trip attacks.

A defender (only) with more than four legs gains a +4 bonus on opposed checks to avoid being tripped. Some creatures, such as dwarves, are more stable than other bipeds and gain a +4 bonus to resist being tripped while standing on the ground (see the dwarf race entry in the Player's Handbook).

• If you attempt to trip a foe and win the ensuing opposed check, you dump your foe to the ground.

Your foe falls to the ground and winds up prone. If you've pulled your foe down from a height (as you might if you've tripped a climber or rider), the foe might take some falling damage.

• If you attempt to trip a foe and lose the ensuing opposed check, your foe gets a free attempt to trip you.

Your foe is not required to make a trip attempt against you. If he chooses to make the attempt, that's not an action for your foe. The foe does not make a touch attack to trip you, and the attempt does not provoke an attack of opportunity from you.

The checks the two of you make to resolve the trip attempt aren't actions for either of you.

The rules don't say so, but it's best if you don't allow the original attacker another trip attempt if the defender's reactive trip attempt fails.

Size Modifiers for Trip Attacks 

As noted in Part One, you receive a bonus on opposed checks to resolve trip attacks if your size is bigger than Medium. You get a penalty on opposed checks to resolve trip attacks if your size is smaller than Medium. Your size modifier applies whether you're the attacker or the defender, and the size modifier for trip attempts is the same as the modifier for grappling. Table 7-1 in the Monster Manual shows the modifiers, but I've included them here for convenience.



The trip attack covers almost any situation in which one combatant tries to make another fall down, from sticking out a foot to cause a character to stumble to yanking a rider out of the saddle.

Who Can Be Tripped: Any creature that is subject to gravity and somehow holds itself off the ground is subject to trip attacks. Incorporeal creatures can't be tripped -- even by other incorporeal creatures -- because they can't fall down. A prone creature has already fallen down and can't be tripped. (This can prove significant when you've tripped a foe and wish to keep him down; see the section on being tripped [below].) Limbless creatures pretty much just lie on the ground (at least while using their normal land speeds or just standing around on a fairly level space) and usually can't be tripped unless they're climbing or in some other precarious situation. This includes creatures with the ooze type, snakes, and anything else that wiggles and slithers. The rules don't give any guidance on creatures whose body types make them immune to trip attacks, so you'll have to rely on your common sense here.

Tripping Climbers: When you make a trip attack against a creature using the Climb skill or using a climb speed, you literally dislodge the climber from the surface she is ascending (or descending). You resolve the trip attack just as you would any other trip attack, except that if you succeed the climber falls. The climber, however, can make a Climb check to catch himself as noted in the Climb skill description. If the climber doesn't catch herself, she falls to the bottom of the slope or wall she was climbing and takes the appropriate amount of damage. The climber is prone after falling.

Tripping Flyers: A creature flying with wings can be tripped. If the attempt succeeds, the creature stalls and falls 150 feet. See Rules of the Game: All About Movement for details (and a few unofficial additional rules about tripping flying creatures).

Creatures that fly without wings (and any creature with perfect manoeuvrability) can't be tripped while flying. If the creature is still in the air after stalling, it must succeed on a DC 20 Reflex save to recover and resume flying. Otherwise it falls another 300 feet. If it hits the ground, it lands prone and takes falling damage.

Tripping Swimmers: Since water tends to hold creatures up, you can't trip a swimmer.

Tripping Riders: You can pull a rider out of his seat with a trip attack. If you win the opposed check, the rider falls off his mount and takes 1d6 points of damage if the mount is moving or standing on the ground. If you make someone fall off a flying mount, she could take considerably more damage, depending on the mount's altitude. The rider on a mount that isn't flying can attempt a Ride check (DC 15) to soften the fall and take no damage. The rider lands on his feet if he successfully softens his fall. If he takes damage, he falls prone.



Using a weapon to trip a foe is a great idea. You avoid the attack of opportunity you provoke if you tried to trip the foe using your hand. If you trip with a reach weapon, you can trip at a distance -- albeit a fairly short one. Finally, if you lose the required opposed check and become subject to a trip attempt from your foe, you can avoid the attempt by dropping the weapon (a free action). If you drop the weapon, you must decide to do so before you and your foe make opposed checks to resolve the reactive trip attempt.

You can't trip with just any weapon. The weapon has to be flexible enough to wrap around the foe (or part of the foe) or it must have some sort of a hook or projection at the business end that can snag a foe. It would be helpful if Table 7-5 in the Player's Handbook indicated which weapons are useful for trip attacks, but it doesn't. The rules for trip attacks on page 159, however, include a list of weapons that can be used in trip attacks. The detailed weapon descriptions on pages 114-122 in the Player's Handbook also mention if particular weapons are useful for trip attacks. The weapons from the Player's Handbook you can use to trip foes are spiked chain, dire flail, heavy flail, light flail, guisarme, halberd, and whip. The spiked chain, guisarme, halberd, and whip have reach. The spiked chain and whip can be used against foes adjacent to you.

When considering weapons introduced in other books, check the text description included with the weapon. If the weapon can trip a foe, the text describing the weapon will say so.



As noted in Part One, you fall prone when a foe successfully trips you. Also as noted in Part One, when you're prone, you cannot make ranged attacks with weapons (except for crossbows) and you suffer a -4 penalty on melee attacks. If you're attacked while prone, you gain a +4 bonus to Armor Class against ranged attacks but take a -4 penalty to Armor Class against melee attacks.

Standing up from being prone is a move action that provokes an attack of opportunity. You can crawl 5 feet as a move action without getting up, but doing so provokes attacks of opportunity. See Rules of the Game: All About Movement for details.

It's possible to attempt a trip attack as an attack of opportunity. Fortunately, you can't be tripped while getting up from prone, at least not through the attack of opportunity you provoke. That because attacks of opportunity are resolved before the actions that provoke them (there are a few exceptions, see Rules of the Game: All About Attacks of Opportunity for details). When you try to stand up from a prone position, the attack of opportunity comes before you get back on your feet. Since you're still prone when the attack comes, the attack of opportunity can't trip you.

Your foes still can use trip attacks to keep you down when you're prone, however. A foe can use the ready action to prepare a trip attack against you when you stand up.

Some people think you don't threaten the area around you after you've been tripped (or any time you're prone). That's not true, however. You have some penalties (as noted earlier), but you still can make melee attacks into the squares around you.



That wraps up our discussion of tripping. To read more about using this tactic in your D&D game, remember to take a look at a (Tactics and Tips columns that deals with tripping).



Skip Williams keeps busy with freelance projects for several different game companies and was the Sage of Dragon Magazine for many years. Skip is a co-designer of the D&D 3rd Edition game and the chief architect of the Monster Manual. When not devising swift and cruel deaths for player characters, Skip putters in his kitchen or garden (rabbits and deer are not Skip's friends) or works on repairing and improving the century-old farmhouse that he shares with his wife, Penny, and a growing menagerie of pets.

Based on the original Dungeons & Dragons® game by E. Gary Gygax and Dave Arneson and on the new edition of the Dungeons & Dragons game designed by Jonathan Tweet, Monte Cook, Skip Williams, Richard Baker, and Peter Adkison.

D&D, Dungeons & Dragons, and Forgotten Realms are registered trademarks owned by Wizards of the Coast, Inc. All Wizards characters, character names, and the distinctive likenesses thereof are trademarks owned by Wizards of the Coast, Inc. This material is protected under the laws of the United States of America. Any reproduction of or unauthorized use of the material or artwork contained herein is prohibited without the express written permission of Wizards of the Coast, Inc. This product is a work of fiction. Any similarity to actual people, organizations, places, or events is purely coincidental. This Wizards of the Coast game product contains no Open Game Content. No portion of this work may be reproduced in any form without written permission. To learn more about the Open Gaming License and the d20 System License, please visit www.wizards.com/d20. ©2001-2006 Wizards of the Coast, Inc. All rights reserved. Made in the U.S.A.