1. Basic information on game modes

* The desired game mode has to be entered before 15 seconds mark, otherwise Normal Mode is selected.
* First available player may enter these commands, checking the player list from the top.
* Game modes are entered in a single line with no separation, like "-dmaridsc", or alternatively, they can be entered separated from each other, with a hyphen (-) in front of each mode, such as "-dm -ar -id -sc".
* The order doesn't matter. The game will handle it or (in case of incorrect combination) give you another chance.

2. Primary game modes

* Only one of these can be selected.
* Incompatible secondary game modes are listed as well.

Normal Mode --> Team Pick

This mode is selected when no other primary mode is during the first 15 seconds. Players may pick heroes from taverns belonging to their team.

-allpick / -ap --> All Pick

Everyone may pick heroes from any tavern.

-allrandom / -ar --> All Random

Every player gets a random hero from any tavern.

-teamrandom / -tr --> Team Random

Every player gets a random hero from the taverns belonging to their team.

-moderandom / -mr --> Mode Random

Randomly picks a mode from All Random, All Pick, Team Random and Normal Mode.

-leaguemode / -lm --> League Mode

All forms of random are disabled. 10 players required. The teams will pick in alternating orders, one team picking one hero, the other team picks two heroes, the first team picks two heroes, the other team picks two heroes, the first team picks their two last heroes, the other team picks their last hero (1-2-2-2-2-1). Each player has 20 seconds to pick a hero, otherwise one is randomed for him/her. The team which has the first pick is random. Can only pick from your side, Sentinel or Scourge, like Normal Mode.

-randomdraft / -rd --> Random Draft

Needs an even amount of players on each team to be activated. Goblin Techies cannot be picked in this mode. 22 random heroes are picked from all available ones and placed into 2 taverns (available for both Sentinel and Scourge). The remaining heroes are removed, as well as the rest of the taverns. Players then pick from those two taverns like in League Mode.

-voterandom / -vr --> Vote Random

Three random matchups will be chosen, and each player gets to cast a vote on which of the three matchups they want, using -option 1/2/3. Needs an even amount of players on each team to be activated.
Read the V. Vote Random commands section for more information.

-extendedleague / -xl --> Extended League

All forms of random are disabled. 10 players required. Both team leaders (blue for Sentinel, pink for Scourge) may remove up to 3 heroes each from all available ones in the first 20 seconds. Players then pick from the remaining heroes like in League Mode.


-singledraft / -sd --> Single Draft

Each player is presented with three random heroes, one agility, one strength, and one intelligence. They can then pick one of them using -pick 1/2/3 commands.
Read the VI. Single Draft commands section for more information.


3. Secondary game modes

* Any number of these can be selected along with primary mode, however there are multiple restrictions (listed below).

-deathmatch / -dm --> Death Match

If you die, you will have to pick a new hero once you can respawn. If a random primary mode was selected, you will receive a hero according to that random mode. A team loses if it has 44 deaths (you can change this value with -lives # command), or if its ancient is destroyed.
Read the VI. Death Match commands section for more information.

-reverse / -rv --> Reverse Mode

The Sentinel's players pick the Scourge's team and the Scourge's players pick the Sentinel's team. Needs an even amount of players on each team to be activated.

-mirrormatch / -mm --> Mirror Match

Requires that both teams have the same number of players. After one minute, each player pair (blue - pink, teal - gray, purple - light blue, yellow - dark green, orange - brown) will have their heroes replaced with either one of the two they had. In the end, each player pair has the same hero, and both teams have the same matchup.

-duplicatemode / -du --> Duplicate Mode

The same hero can be picked or randomed by multiple players.

-shuffleplayers / -sp --> Shuffle Players

The teams will be randomly shuffled. This includes which colour you have and which side you are on. Also evens the number of players in both teams if possible.

-samehero / -sh --> Same Hero

All players will have the hero that blue picks.

-allagility / -aa --> All Agility

Only Agility heroes will be allowed.

-allintelligence / -ai --> All Intelligence

Only Intelligence heroes will be allowed.

-allstrength / -as --> All Strength

Only Strength heroes will be allowed
-itemdrop / -id --> Item Drop

When you die, a random slot in your inventory will drop whatever it holds. If that slot is empty, nothing happens. You no longer lose money when dieing.

-easymode / -em --> Easy Mode

Towers are weaker, experience is gained faster, and you get twice as much periodic gold (16 every 7 seconds, that is). Please refer to Nova's Guide to Experience for experience values and to Y0UR's All about Towers Guide for tower data.

-nopowerups / -np --> No Powerups

No runes will spawn.

-supercreeps / -sc --> Super Creeps

Every now and then, a super creep may spawn for each side and follow the creeps in either lane. The weakest supercreep is the Siege Golem, a bit stronger is the Scary Fish, and the Ancient Hydra is the strongest one.
Sorry for the overall vagueness here, I'm working on it.

-onlymid / -om --> Only Mid

Same as -ntnb, but towers in top and bottom lane are invulnerable.

-notop / -nt --> No Top

No creeps spawn at the top (left) lane. Towers there are still vulnerable.

-nomid / -nm --> No Middle

No creeps spawn at the middle lane. Towers there are still vulnerable.

-nobot / -nb --> No Bottom

No creeps spawn at the bottom (right) lane. Towers there are still vulnerable.

-noswap / -ns --> No Swap

Swap commands do not work.
Read the VIII. Swap commands section for more information.
-norepick / -nr --> No Repick

-repick command does not work.

-terrainsnow / -ts --> Terrain Snow

This transforms the current terrain into a snow terrain. This is a very experimental mechanism and is still very much a WIP in the visuals department.

4. For fun game modes

* Must be entered separately, but still before 15 seconds mark.

-wtf --> What The Fuck Mode

Basically, all hero and item abilities have no cooldowns and cost 0 mana. When an ability is used, all cooldowns are reset and your mana is set to full. Certain triggered abilities will seem as if they have no cooldown, but will not have any effect until the time in which it would normally be cooled down has passed (one example is Borrowed Time).

5. Vote Random commands

* Can be entered up to 30 seconds after Vote Random mode is selected.
* If no option is selected, one will be randomed. If the voting is a draw, one option will be randomed out of all three options, regardless of votes.
* Must be entered separately.
* You can use only one of these, i.e. you can't change your decision once you've voted.

-option 1 --> Option One

Vote for first presented matchup.

-option 2 --> Option Two

Vote for second presented matchup.

-option 3 --> Option Three

Vote for third presented matchup.
6. Game commands

* Must be entered separately.

-pick 1 --> Agility Hero
Pick the first presented hero.

-pick 2 --> Strenght Hero
Pick the second presented hero.

-pick 3 --> Intelligence Hero
Pick the third presented hero.

7. Death Match commands

* First available player may enter these commands, checking the player list from the top.
* Can be entered up to 15 seconds after Death Match mode is selected.
* Must be entered separately.

-nd --> No Death Timer

There won't be any respawn time when a hero dies.

-lives # --> Maximum lives

Sets how many lives each side has. Replace # with the desired number. Minimum of 10, maximum of 44.

8. Game commands

* Can be used repeatedly during whole game (with exceptions).
* Usable by everyone.

-matchup / -ma --> Display matchup

Displays which opponent controls which hero, and it's level. Also shows the time the player left the game (if he/she did).

-movespeed / -ms --> Display movespeed

Displays your hero's movement speed.
-creepstats / -cs --> Display creep stats

Shows how many creeps you have killed, as well as how many you have denied.

-cson --> Show Creep Stats scoreboard

Shows creep stats in the title of the default multiboard.
Renamed from -csboardon in v6.33

-csoff --> Hide Creep Stats scoreboard

Hides creep stats from the title of the default multiboard.
Renamed from -csboardoff

-disablehelp --> Disable Help

Makes allied Chen's Test of Faith unable to teleport you. Makes allied Furion unable to cast Sprout on you. Makes allied Harbinger unable to cast Astral Imprisonment on you.

-enablehelp --> Enable Help

On by default. Toggles -disablehelp off.

-unstuck --> Unstuck

Channels for 60 seconds, then moves your hero back to your base.

-recreate --> Recreate

Available for N'aix, Terrorblade, Dragon Knight and Banehallow. Use when close to the fountain if you have lost control of your hero (metamorphosis problem). 200 seconds channeling. Also usable with Leshrac, although he doesn't need it anymore.
Added in v6.05
Leshrac bug fixed in v6.48
IceFrog told me that with the possible exception of N'aix, this command is probably redundant now, especially after v6.49 N'aix remake.

-showmsg --> Show hero death messages

On by default. You see a text message when a hero dies.
Renamed from -unhidemsg

-hidemsg --> Hide hero death messages

Makes it so that there is no text displayed when a hero dies.

-showdeny --> Show deny notification

On by default for observers.
Every time you, an ally or an opponent makes a deny you see an exclamation mark in the color of the player that denied the creep.

-hidedeny --> Hide deny notification

On by default. Toggles -showdeny off.

-weather rain/snow/moonlight/wind/random/off --> Weather effects

Makes the desired weather.
-weather random randomly changes weather every 5 minutes.
-weather off switches off weather effects.
-weather rain/snow/off added in v6.39
-weather moonlight/wind/random added in v6.44

-denyinfo / -di --> Show deny info

Sets -showdeny and -cson.

-deathon / -don --> Show Death Timer board

On by default. Displays Death Timer when hero dies, which shows how much time is left to respawn.

-deathoff / -doff --> Hide Death Timer board

Toggles -deathon off.

-roll # --> Roll

Displays random integer between 0 (included) and #. Replace # with a number between 0 and 2000.

-hideheronames / -hhn --> Hide hero names

Hides hero's class displayed behind player's name in chat. If you want to squelch somebody, use this first, otherwise the /squelch command won't work.

-mute --> Mute kill sounds

Disables kill sounds.

-random --> Random

Gives you a random hero in modes where you have to pick one. Does not cost any gold.

-repick --> Repick

Gives you a new hero instead of the one you already have, at a cost. Can only be used once and only in the first minute, but not in league mode. Repick costs 100 gold normally, but in -ar and -tr it costs 400 gold. If you are playing a random game mode, you will receive a new random hero. If you are playing a pick game mode, you will have to pick a new hero.
Cannot be used when No Repick mode is enabled.

-gameinfo --> Game info

Displays some information on the different game modes that are used.

-afk --> AFK Info

Displays how long each player is inactive.

-kickafk # --> Kick AFK players

Kicks players that have been inactive for more than 10 minutes. Replace # with the number of idle player.

-apm --> Actions Per Minute

Displays your APM.

-courier --> Courier icon

Toggles displaying idle worker courier icon.

-clear --> Clear screen

Clears all game text messages from the screen.
-invokelist --> List Invoker's spells

Displays list of Invoker's spells.

9. Swap commands

* These are just another Game commands, but due to recent changes in swap system, they deserve their own section.
* Can be used multiple times, but only before 90 seconds mark.
* Cannot be used when No Swap mode is enabled.

-swaphero / -swap --> Display hero's numbers

Displays a list of heroes available for swapping along with their numbers, which can then be used in -swap command.

-swap 1/2/3/4/5 --> Swap

Swaps your hero with another player's hero. You can use this command multiple times and even swap with multiple players at once. The number of the player you want to swap with can be accessed via -swaphero / -swap command.

-swapcancel --> Cancel swap requests

Cancels all your swap requests. This includes both requests made by you and your allies.

-swapall --> Swap All

Sends swap requests to all your allies. Also disables -swapcancel.

10. Misc commands

* Can be used repeatedly during whole game.

-fleshstr / -fs --> Flesh Heap Strength

Usable only by Pudge. Shows how much strength he gained from his Flesh Heap ability.

11. Anti-MapHack system

* First available player may enter these commands, checking the player list from the top.
* Must be entered separately, between 15 and 60 seconds of game time.

-ah --> Anti-MapHack

Enables maphack protection. Highly experimental, report bugs directly to IceFrog@gmail.com. After using this command, you have to choose one of the two supported modes using -mode1 or -mode2 commands.

-mode1 --> Basic Mode

This is a basic version that only operates on minimap. Use only if you have a problem with -mode2.

-mode2 --> Recommended Mode

This covers more areas and is the recommended version.

12. Single Player commands

* Can be used only in Single player, or when Test Mode is enabled.
* Can be used repeatedly during whole game.

-lvlup --> Level up

Levels up your hero by 1 level.

-refresh --> Refresh

Refreshes the cooldown for all of your items and skills. Similar to using a Refresher Orb, except that it works for all of your skills and items. Also replenishes your hp and mana.

-spawncreeps --> Spawn creeps

Spawns creeps for both Sentinel and Scourge. Does not interfere with the normal creep spawn times.

-powerup --> Spawn runes

Spawns rune. Does not interfere with the normal rune spawn times. Note that rune won't spawn if there already is one, or was one less than 5 seconds ago.

-neutrals --> Spawn neutrals

Spawns neutral creeps in all camps that doesn't have units nearby. Note that corpses count as units. Does not interfere with the normal neutral creeps spawn times.

-kill --> Suicide
Kills your own hero.