Changes from DotA

DotA, or Defense of the Ancients, was a custom map created for the Blizzard game, Warcraft 3 and Warcraft 3: The Frozen Throne. It borrowed many elements from the game and was based on its engine. Dota 2 is a complete game created by Valve on the Source Engine, however, and many differences exist due to copyright concerns, engine disparities as well as various bugs or intended changes to Dota 2.

Hero Gameplay Changes

 * Additional s refresh all previous Quill Spray durations (much easier to stack Quills compared to DotA 1). It also has an effect indicator.
 * 's can't explode while in mid air. It'll always hit the enemy.
 * 's now stops Fountain healing.
 * 's projectile can't be seen with True Sight. (Enemy can't dodge it now even if it goes though towers)
 * and 's Blink are no longer restricted by unexplored terrain. This also affects.
 * 's will slow a unit's turn rate in addition to movement speed.
 * 's now goes through.
 * 's damage can be fully avoided by instead of partially (damage ticks are calculated continuously instead of at set times).
 * 's 's is triggered by killing a unit with.
 * 's will no longer award gold after it has been dispelled.
 * can keep auras during his, so , 's Burn Aura, 's Endurance Aura and others all properly function.
 * can now walk properly in her web while in trees.
 * 's (without ) will latch to neutrals.
 * 's cannot freeze the enemy's Fountain
 * Frostbite and other Entangles now also work on using  (as well as 's  and ).
 * 's can hit invisible units and those in fog.
 * no longer needs to turn to cast around him. (also with the casting backswing disabled in Dota 2, he can cast spells and attack much faster)
 * cannot be cast while silenced.
 * 's can block  and.
 * can no longer kill s with.
 * 's now applies a regular stun rather a pause effect. So bashed units coming out of Chronosphere won't have the additional stun time, and Heroes with toggleable abilities such as  and  can continue using their abilities inside Chronosphere. Another effect is that Cycloned units won't fly for the full duration inside the Chronosphere.
 * can no longer kill couriers with.
 * 's delay effect can't be seen with True Sight.
 * can no longer follow across the map while charging with.
 * It is now much easier to surround heroes with 's.
 * 's no longer gives flying vision.
 * is not invulnerable during the first Omnislash strike, therefore he can be killed with if his health is low enough.
 * 's now has a marker at where it will crash.
 * 's now leaves a trail.
 * 's cannot be stopped by Hex or Entangle.
 * 's no longer cancels 's.
 * 's no longer has strange interactions with various orbs and critical strike effects and will not break on acquiring them or procing them.
 * 's clones are now affected by.
 * 's can now dodge projectile stuns even when under True Sight.
 * can morph a stat to 0.
 * 's does not dispel any buffs/debuffs from hero that can be used to locate the real hero (eg., , , , etc.).
 * won't receive a temporary 3 second buff when you level the skill for the first time.
 * Orb walking with and  while having lifesteal works correctly now.
 * 's now has a visual indicator that shows when its duration will end (via an expanding red ring).
 * Stolen intelligence from is now displays as a buff.
 * Heroes imprisoned under will still take damage if they have a DoT spell beforehand nor will it disable toggled abilities (eg.  will not stop ting while banished, and will still take self-damage.
 * 's is now much more visible, making her easier to spot.
 * 's leash can now be broken by a multitude of spells such as, , , , etc.).
 * 's can be canceled.
 * 's duration and damage does not get reduced against tougher creeps (no level 6 penalty in Dota 2).
 * 's no longer lets units under its duration attack if they possess an orb effect like  or.
 * and can be seen while attacking when under  and under their own invisible buff.
 * 's does not stop.
 * can instantly return to invisibility after a Silence debuff wears off instead of applying a fade time.
 * 's now works on all abilities, whereas engine limitations prevented Rubick from stealing some skills in DotA 1. (See Spell Steal Interaction for more information)
 * can no longer get souls from.
 * 's can no longer be evaded with invisibility.
 * 's stun now also goes through magic immunity.
 * 's does not proc.
 * can now walk properly through 's spectral path.
 * However Spectre can only walk with 0 collision through the path, whereas in DotA 1 you can walk anywhere.
 * 's is not interrupted by instant cast items like  or.
 * 's occurs AFTER the attack animation finishes, instead of before.
 * 's area of effect while Charging is smaller (possibly due to above change).
 * 's can no longer splash damage of abilities (eg., ).
 * 's is centered on the cast point instead of himself like in DotA 1. You'll have to cast it on himself to reproduce the same effect as in DotA 1.
 * 's will refresh 's damage cooldown, so you can blink right away immediately after Rearming.
 * 's +  combo does less damage than in DotA 1 and damage occurs with less instances. (Max 5 in Dota 2 vs 10 in DotA 1).
 * 's can cancel 's  and 's.
 * 's stacks only lasts 6 seconds on Roshan.
 * 's first attack after can proc.
 * can deny himself with.
 * can interrupt with.
 * 's now goes through.

Fog of War Changes

 * This is getting its own section because this is a HUGE difference compared to dota 1; Losing sight of your enemy in the fog no longer "stops" your hero! Instead you will keep following them to the last seen location, if you have vision again you'll keep autoattacking without any additional input. Also if you're ranged, any projectiles in the air will follow them in the fog, you can use that to track location.
 * To dota 1 veterans, this means you are often better off leaving your hero on autoattack rather than clicking ahead. After you cast a spell, reclick to keep your hero "locked" on. This also means juking is harder to do, and just going in and out of trees or using ramp los won't cut it anymore.


 * Note this only applies to auto attacks, targeted spell abilities still work as they do in dota 1 for some reason.
 * Some skills and items that give flying vision and can be used to peer into rosh pit/see into higher ground ward spots don't work anymore. Eg Sandstorm, dazzle weave, manta style and mirror image type skills, etc. A few skills still work though, like static remnant and firefly.

Item Changes

 * additional mana can now give over your maximum mana pool, making it more useful. So now you can use soul ring then spell rather than spell, soul ring, spell when at full mana.
 * now removes as well.
 * no longer damages the owner of wards. Eg, and.
 * no longer has a projectile (no double gold trick).
 * can now also be used by 's Spirit Bear Portrait.png Spirit Bear (though it doesn't give experience).
 * can now be used by 's Spirit Bear Portrait.png Spirit Bear and is normally affected by the HP drain but does not benefit from the strength bonus.
 * is now a Unique Attack Modifier.
 * 's bonus speed now stacks with other scepters, despite the Dota 2 tooltip claiming otherwise. (Though this might be fixed in the future)
 * (both ranged and melee versions) will now work with items that grant Lifesteal, but are both Unique Attack Modifiers.
 * can be used in conjunction with.
 * can be used in conjunction with.
 * do not prevent, , or items that grant Critical Strike from procing.
 * no longer grant invisibility through outside of tree range during phase duration.
 * now works with Unique Attack Modifiers. (Also works on 's, but only on the main target), in DotA 1 the extra damage was disabled when you had an orb.
 * 's backstab damage and other critical strikes stack, so instead of either one procing, both are applied.
 * can be used in conjunction with.
 * can be filled with another rune even when not empty.
 * A with a rune in it is no longer a shareable item (in DotA 1 it could not be used anyway).
 * You can instantly refill a by giving allies the bottle as soon as they teleport in from the fountain (since allies retain the fountain regen aura for a few seconds).
 * now stacks with.
 * can be used with, but does not work for s, needing to use the Scepter first, then the scroll.
 * Items can be combined even if you don't have to slots for it.
 * Lightning attack modifier ( and ) only counts as an attack modifier when it procs, so it stacks with other orb effects.
 * Courier is automatically upgraded to a flying version when a player buys the flying recipe, no longer needing the courier to pick it up.
 * Courier control is shared automatically, there's no option to take away control.
 * Flying courier can no longer be flown close enough to give vision to enemy fountain area without been killed.

Misc. Changes

 * Neutrals spawn 1 second later rather than exactly at the full minute mark like in dota 1. (Spawn triggered at end of full minute mark rather than beginning)
 * Each tree has its own timer as to when it'll grow back as opposed to having a global timer for all trees.
 * Melee heroes won't miss even if target hero moves out of melee range during the swing animation. Eg Enemy force staffs away, storm ulties away, fast move speed + slow IAS etc. This is due to no melee range buffer in dota 2.
 * Casting backswing animation no longer occurs before auto attacking. Eg heroes will now ignore their backswing animation if an enemy hero is in attack range and will immediately start auto attacking or running towards them. Most noticable on heroes with long animations like cm compared to dota 1.
 * Glyph Buildings get 0 damage by physical attacks, but still get damaged by magic (in dota 1, buildings merely have increased armour and can still be damage by attacks).
 * You can pick up runes while doomed.
 * Cleave works against flying units (cept Visage familars).
 * You can't cancel attack while under battle cry and duel.
 * You are no longer blocked by items while invisible.
 * You can't cancel meld with x-mark, sprout or fissure.
 * Spirit bear entangle does 60 more damage than dota 1, also occasionally does 4 ticks instead of 3 for additional damage. Damage also bypasses damage block reduction.
 * Damage block procs when damage source is invulnerable (it doesn't in dota 1), making omnislash less effective against tree armor and vanguard like skills.
 * Juke methods with sand king and slark burrow striking/leaping across certain map areas have been removed.
 * Where as now batrider can go out of the map boundaries.
 * TP will be broken if the unit been tped to has been dominated. (no more chen fountain trick!)
 * Projectiles are coded to take effect when it hits rather than when its cast, so you could have things like troll bashing in range mode or cleaving with enpower or lifestealing with vlads by switching it to melee before it hits.
 * If somebody gets X'd and returns, it always cancels channeling spells, even if they didn't move. This is useful if you have to interrupt something like an Epicenter where Torrent would be too slow.
 * Right click follow on your allies' heroes does not auto attack the target of the followed unit (where as they did in dota 1).
 * Can no longer auto stack creeps due to missing patrol command.
 * Sounds from different lanes outside of screen range can be heard occasionally, including sounds not visible in fog. (Eg sounds from rosh pit when you have no vision)
 * Creeps will not run while under effect of wildkin tornado.
 * Troll warlord can raise skeletons from ability kills that normally don't produce corpses, eg devour, midas.
 * You can't tell when Roshan has respawned with the neutral green indicator anymore as in dota 1.
 * Roshan's spell shield doesn't trigger on untouchable, incapacitating bite or headshot.
 * There's no messages to tell when the aegis will expire.


 * You can now see the cooldown timers, manabars and skills of your allies.
 * Hotkeys are customizable without customkeys or 3rd party programs
 * Skills can be leveled up while dead.
 * You now have an item stash where only you can access.
 * Dissembling can be done by right clicking an item while in fountain without the lengthy placing in item circle then dissemble process in dota 1.
 * AI practice bots are implemented natively.
 * You can resell items within the first ten seconds for full price, if they were not combined or activated.
 * Fountain cannot be attacked
 * Hero can no longer be deselected (except for selecting other controllable units, such as Couriers or pets)
 * Observers and replays will show a circle indicating when Roshan will respawn.
 * Item shops are condensed (there are now only the main shop, side lane shops, and secret shops)
 * Orb Effects are called Unique Attack Modifiers.
 * Control Groups now save between summons for summoned units (even when they die)
 * Items and many heroes have entirely new lore.
 * Most skills now stack. For example, skills that apply the common 30% MS 20% AS slow: Crystal Maiden, Lich, Jakiro; also Chen 's Penitence with Night Stalker 's Crippling Fear.
 * Extending the previous point, many skill and item interactions that existed due to its hard-coded nature don't exist any more. For example, Ghost Scepter doesn't remove Poison Nova.
 * Bashes damage type and stun type doesn't depend on the range of the hero (used to be magical damage / physical stun on melee and the opposite for ranged). Instead, it depends on the source of the bash. Skills from heroes work like in DotA1, Monkey King Bar gives magical stun and damage, and Skull Basher works like melee.
 * Damage from multiple Monkey King Bars stack if they proc at the same time. It doesn't override any other on-hit effect either.
 * There is no text above Spellsteal's projectile displaying which spell was stolen in Dota2.
 * Various ability renames: most Wind Walk abilities were given alternative names, and a few ability names were changed to make their effect more obvious (Lion's Impale became Earth Spike, for example).
 * Due to different engine and skill interactions you may find the gameplay and power of different heroes very different to dota 1!

Items Name Changes
Due to copyright concerns, some items and heroes in Dota 2 have different names from their DotA equivalent.


 * Lothar's Edge is now Shadow Blade
 * Buriza-do kyanon is now Daedalus
 * Sobi Mask is now Sage's Mask
 * Ancient Janggo of Endurance is now Drum of Endurance
 * Kelen's Dagger is now Blink Dagger
 * Mask of Death is now Morbid Mask
 * Nathrezim Buckler is now Buckler
 * Khadgar's Pipe of Insight is now Pipe of Insight
 * Cranium Basher is now Skull Basher
 * Eaglehorn is now Eaglesong
 * Guinsoo's Scythe of Vyse is now Scythe of Vyse
 * Circlet of Nobility is now Circlet
 * Headdress of Rejuvenation is now Headdress
 * Stygian Desolator is now Desolator
 * Planeswalker's Cloak is now Cloak
 * Ogre Axe is now Ogre Club
 * Messerschmidt's Reaver is now Reaver
 * Boots of Elvenskin is now Band of Elvenskin

Hero Name Changes

 * Anub'arak the Nerubian Assassin is now simply Nyx Assassin
 * Alleria the Windrunner is now Lyralei the Windranger
 * Leoric the Skeleton King is now Ostarion the Wraith King
 * Kael the Invoker is now just Invoker
 * Rexxar the Beastmaster is now Karroch the Beastmaster
 * Anub'seran the Nerubian Weaver is now Skitskurr the Weaver
 * Furion the Prophet is now simply Nature's Prophet
 * Dwarven Sniper is now just Sniper
 * Priestess of the Moon is now Princess of the Moon
 * Luna Moonfang the Moon Rider is now Luna the Moon Rider
 * Shendelzare Silkwood the Vengeful Spirit is now Shendelzare the Vengeful Spirit
 * Clockwerk Goblin is now just Clockwerk
 * Kel'thuzad the Lich is now Ethreain the Lich
 * Vol'Jin the Witch Doctor is now Zharvakko the Witch Doctor
 * Darchrow the Enigma is now just Enigma
 * Jin'Zakk the Batrider is now just Batrider
 * Jah'rakal the Troll Warlord is now just Troll Warlord
 * Murloc Nightcrawler is now just Nightcrawler
 * Magina the Anti-Mage is now just Anti-Mage
 * Aurel Vlaicu the Gyrocopter is now Aurel
 * Aggron Stonebreaker the Ogre Magi is now Aggron Stonebreak the Ogre Magi
 * Pugna the Oblivion is now just Pugna (although "oblivion" is still referenced in his lines and lore, he possesses no title in Dota 2)
 * Nessaj the Chaos Knight is now just Chaos Knight
 * Obsidian Destroyer is now Outworld Devourer
 * Pandaren Brewmaster is now just Brewmaster
 * Centaur Warchief is now Centaur Warrunner
 * Lina Inverse the Slayer is now Lina the Slayer
 * Rylai Crestfall the Crystal Maiden is now Rylai the Crystal Maiden
 * Rikimaru the Stealth Assassin is now Riki the Stealth Assassin
 * Doom Bringer is now just Doom
 * Eredar the Shadow Demon is now just Shadow Demon
 * Rizzrak the Goblin Shredder is now Rizzrack the Timbersaw
 * Cairne Bloodhoof the Tauren Chieftain is now Elder Titan, the Worldsmith
 * Necrolyte is now Necrophos
 * Tuskarr is now simply Tusk
 * Thrall the Disruptor is now Disruptor the Stormcrafter
 * Terrorblade the Soul Keeper is now Terrorblade the Demon Marauder
 * Icarus the Phoenix is now just Phoenix

Buff Placers
Buff Placers refer to a group of Items in DotA that applied a buff to a Hero's attacks. Typically, they were also Orb Effects. Unlike Orb Effects, which do not stack for balance reasons, the Warcraft 3 engine was limited in that it only allowed one buff to be applied per attack. This meant that Buff Placers did not stack. In Dota 2, however, Buff Placers will now stack with each other. For example, Venomancer's Poison Sting will now stack with Desolator, even though both of them were Buff Placers in DotA.