Units are what you roll and send to the front. Here is how equipping, merging and fielding your best pulls works in Roll to Defend.
You can only field a limited number of units at once, so you equip your highest-rarity pulls first. The +1 Equip gamepass raises the slot cap and Auto Equip Best fills your slots with your strongest units automatically. Spare duplicate units can be merged to strengthen a unit rather than sitting idle.
In Roll to Defend, every unit you own starts as a Roll. You spend Coins, pull a random unit whose rarity is written as odds, then place your best pulls on the path to fight the endless zombie waves. This page explains how units and equipping work as a system, and how to choose what to field as the waves escalate.
Units in Roll to Defend are not bought or crafted one by one. You get them from the gacha: spend Coins to Roll, and each Roll hands you a single unit at some rarity. That rarity is expressed purely as odds, from a common 1/10K all the way up to a 1/10B secret, with no named tiers like common or rare in between. The screen shows the big numbers directly, so a lucky pull can read as something like "1 in 67.2 QN."
The odds map straight to power: the rarer the pull, the stronger the unit tends to be. That is why volume and Luck matter so much. Luck is a multiplier that shifts your odds toward rarer units, so pairing lots of rolls with a higher Luck stat is how you actually land the units worth fielding. For the full breakdown of odds and how Luck bends them, see rolling and luck and rarity and odds.
A named list of specific units, with their individual behavior, will live here once the game's roster becomes publicly confirmed. For now, the mechanics below apply to every unit you pull.
Owning a strong unit does nothing until it is on the path. You can only field a limited number of units at once, and that cap is your equip slots. Everything else sits idle in your collection.
The rule for filling those slots is simple: place your highest-rarity pulls first. Since rarity tracks power, your rarest units are almost always your hardest hitters, so they earn the slots. When you pull something rarer than a unit you are currently fielding, swap the weaker one out.
Two gamepasses change how you handle slots:
Both are covered on the gamepasses page. +1 Equip raises your ceiling; Auto Equip Best saves you the manual sorting, which adds up once you are rolling in bulk.
When you Roll a lot, you pull copies of units you already own. Rather than leave duplicates sitting idle, you can merge them to strengthen a single unit instead of holding several weaker copies. This turns otherwise dead pulls into real power on one fielded unit, which matters most when your equip slots are full and every slot needs to hit as hard as possible.
Merging works best on units you already plan to field. Fold your extras into a rare pull that has an equip slot, rather than spreading duplicates across units you will never place.
The zombie waves in Roll to Defend are endless and get stronger the further you go. Your equipped units auto-attack, and clearing waves pays Coins. The moment a wave outpaces your field is the game telling you to react.
When your current lineup starts falling behind, you have a few levers:
Play the odds honestly here. Because a 1/1M unit is pulled by only about 25.9% of all Roll to Defend players and a 1/1B by 2.7%, chasing a specific rarer unit takes real roll volume. Raising Luck first makes that chase far shorter.
Coins keep accruing in Roll to Defend while you are logged off, and offline earnings come from whatever units are on the path when you leave. Before you log out, set your strongest lineup so the field keeps clearing waves at its best rate. When you return, spend the banked Coins on a concentrated burst of rolls, then re-equip any rarer units you land.
That loop, Roll to Defend rewards for repeating, is the core of the whole game: field your best, bank Coins while away, roll hard when you return, and swap in every upgrade. New players can pick up the full sequence in the beginner guide, and roll-count goals are tracked on the progression page.
