---
title: Verse：Verseとは何か？そして、私たちがVerseを作った理由 | Unreal Fest Tokyo 2026
tags:  #unreal fest #unreal fest tokyo 2026  
author: [エピック ゲームズ ジャパン](https://www.docswell.com/user/EpicGamesJapan)
site: [Docswell](https://www.docswell.com/)
thumbnail: https://bcdn.docswell.com/page/Y76MNYV6EV.jpg?width=480
description: 講演内容：Verseとは何か、そしてEpic Gamesがなぜ新しいプログラミング言語を開発しているのか。本セッションでは、Verseが解決する課題や、UE6およびScene Graphにもたらすものについて解説し、Verseの主な言語機能も紹介します。  本講演へのアンケートにご協力をお願い致します： https://docs.google.com/forms/d/e/1FAIpQLScI6FWrr04t65fePUmAE6s4RcAwETxXtOUQwk4M5skRkjaK-Q/viewform  講演者： Magnus Enebakk(Epic Games)  Unreal Fest Tokyo 2026公式サイト： https://www.unrealengine.com/events/unreal-fest-tokyo-2026
published: November 05, 26
canonical: https://www.docswell.com/s/EpicGamesJapan/5DMXQG-UE_UFT2026_Verse
---
# Page. 1

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U E6, VERS E AN D S CENE GRAPH
why we are building it


# Page. 2

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YOU R SPEA KE R
Verse Evangelist, Epic Games


# Page. 3

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A GE NDA
01
02
03
04
05


# Page. 4

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# Page. 5

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WH AT VE RSE I S
for gameplay code
Print("Hello, Unreal")
Count:int = 1.5
# error
var Score:int = 0
for, loop, class, interface
X := if (A) then 1 else 2
<decides><transacts>


# Page. 6

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WH Y V ERSE
one live world
CR EAT O R A
Damage(Amount:float):void
CR EAT O R B
Health.Damage(25.0)
CR EAT O R C
uses B's weapon


# Page. 7

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WH Y V ERSE
one live world
CR EAT O R A
Damage(Amount:float):void
CR EAT O R B
Health.Damage(25.0)
Broken: the call has one argument
CR EAT O R C
uses B's weapon
Broken with the weapon


# Page. 8

![Page Image](https://bcdn.docswell.com/page/LEL89PQM7R.jpg)

WH Y V ERSE
one live world
CR EAT O R A
Damage(Amount:float):void
CR EAT O R B
Health.Damage(25.0)
Keeps working, unchanged
CR EAT O R C
uses B's weapon
Keeps working, unchanged


# Page. 9

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WH Y V ERSE
designed to solve


# Page. 10

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# Page. 11

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EN GI N E TI ME LI N E
UE6
NO W
UE6
UEFN


# Page. 12

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TH E FUTU RE
UEFN + UE5
Engine
Platforms


# Page. 13

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V ERSE IN UE6
sits


# Page. 14

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V ERSE IN UE6
Forward-looking
in UE6


# Page. 15

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FOR UN REA L D EV ELO PERS
maps over
entity
event, listenable
component
@editable
prefab (a class)
GetComponent[t]
OnBegin/EndSimulation
failure
OnSimulate()<suspends>
entity tags
Sleep(), Await()
[]t, [k]v


# Page. 16

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# Page. 17

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TH E L AN GU AGE
at a glance
int
var
16
# constant
player_stats
"Hello, Unreal"
# type inferred
float
# mutable
var
10
AddScore
set
100.0
class
string
int
# required
0
25.0
string int
map "Ana"
int
void
set
player_stats
"Ana"
AddScore 10
Add
int
int
Add 5
int
# last expression is the result
10
# named, optional arguments
SpawnWave
SpawnWave 3
int
float
1.5
0.0
void
# types are snake_case, values are PascalCase


# Page. 18

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TH E L AN GU AGE
expression
# if produces a value
if
50.0
then "Healthy" else "Hurt"
# for produces an array: array{2, 4, 6}
for
array 1
2
3
2
# case produces a value
case
move_mode
300.0
move_mode
600.0
# a function's value is its last expression
Square
int
int


# Page. 19

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TH E L AN GU AGE
what code can do
<computes>
<reads>
<transacts>
<decides>
<suspends>
FindTarget
OpenDoor
turret <decides><reads> agent
door <suspends> void
# can fail, only reads state
# takes time


# Page. 20

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FA IL URE
failure


# Page. 21

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FA IL URE
nested null checks
VERSE
if
GetVehicle
GetComponent weapon_component
GetLoaded
then
Fire


# Page. 22

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FA IL URE
filters
for
IsAlive
IsVisibleFrom
Distance
do
GrantGold 50


# Page. 23

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FA IL URE
everyday code
# was it a player that stepped on the plate?
if
# no score yet? start from 0
player
GrantPoints
Scores
or 0
10
# is there a current target?
# take the first spawn point under the arena
if
FindDescendantEntitiesWithTag spawn_tag
Fire
if
first
Respawn


# Page. 24

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FA IL URE
failable
GetDamage
player
AllStats
int <decides><reads> int
# no stats? fails


# Page. 25

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FA IL URE
failable
GetDamage
player
int <decides><reads> int
AllStats
Weapons
# no stats? fails
# bad slot? fails


# Page. 26

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FA IL URE
failable
GetDamage
player
int <decides><reads> int
AllStats
# no stats? fails
Weapons
# bad slot? fails
0
# not positive? fails


# Page. 27

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FA IL URE
failable
GetDamage
player
int <decides><reads> int
AllStats
# no stats? fails
Weapons
# bad slot? fails
0
# not positive? fails
# call it with [ ] in a failure context
if
GetDamage
ApplyDamage
0


# Page. 28

![Page Image](https://bcdn.docswell.com/page/Y79LYK5XJ3.jpg)

FA IL URE
undoes changes
TryBuy
shopper
Pay
if
# fails without enough gold
TakeOne
# fails when sold out
Add
# fails when the bag is full
TryBuy
Equip
item <transacts><decides> void
not kept yet
not kept yet
fails


# Page. 29

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FA IL URE
Planned
to know why
buy_error
Buy
enum
shopper
item <transacts> result item
Pay
or
TakeOne
or
return MakeError buy_error
Add
or
return MakeError buy_error
MakeSuccess
buy_error
return MakeError buy_error


# Page. 30

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FA IL URE
Planned
to know why
buy_error
Buy
enum
shopper
item <transacts> result item
Pay
or
buy_error
return MakeError buy_error
TakeOne
or
return MakeError buy_error
Add
or
return MakeError buy_error
not kept yet
MakeSuccess
not kept yet
THE CAL LER
fails
speculate Buy
if
GetSuccess
The player sees BagFull, and nothing changed.
Equip
else if
ShowError
GetError


# Page. 31

![Page Image](https://bcdn.docswell.com/page/4EM6Z2K67W.jpg)

C ONC URRE NC Y
take time
VERSE
OpenVault
<suspends> void
Play
Sleep 2.0
# wait, without blocking
SlideOpen
# returns when it's open
Await
Stop
# wait for an event


# Page. 32

![Page Image](https://bcdn.docswell.com/page/PERP6MXN79.jpg)

C ONC URRE NC Y
Tick
Tick 1
VERSE TASK
void AVault
if
Tick float
OpenVault
EVaultState
1
<suspends> void
Play
Sleep 2.0
if
0
return
SlideOpen
StartOpening
Await
EVaultState
else if
if
Stop
EVaultState
IsOpen
EVaultState
return


# Page. 33

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C ONC URRE NC Y
Tick
Ticks 2 to 60: the 2 second wait
VERSE TASK
void AVault
if
Tick float
OpenVault
EVaultState
1
<suspends> void
Play
Sleep 2.0
if
0
return
SlideOpen
StartOpening
Await
EVaultState
else if
if
Stop
EVaultState
IsOpen
EVaultState
return


# Page. 34

![Page Image](https://bcdn.docswell.com/page/37KYGQ1LED.jpg)

C ONC URRE NC Y
Tick
Tick 61: the wait is over
VERSE TASK
void AVault
if
Tick float
OpenVault
EVaultState
1
<suspends> void
Play
Sleep 2.0
if
0
return
2
SlideOpen
StartOpening
Await
EVaultState
else if
if
Stop
EVaultState
IsOpen
EVaultState
return


# Page. 35

![Page Image](https://bcdn.docswell.com/page/LJ39NPQ6J5.jpg)

C ONC URRE NC Y
Tick
Ticks 62 to 90: the door is opening
VERSE TASK
void AVault
if
Tick float
OpenVault
EVaultState
1
<suspends> void
Play
Sleep 2.0
if
0
return
2
SlideOpen
StartOpening
Await
EVaultState
else if
if
Stop
EVaultState
IsOpen
EVaultState
return


# Page. 36

![Page Image](https://bcdn.docswell.com/page/8JDGWL9MJG.jpg)

C ONC URRE NC Y
concurrency
sync
race
wins
rush
branch
wins


# Page. 37

![Page Image](https://bcdn.docswell.com/page/VEP392ZQ78.jpg)

C ONC URRE NC Y
as a race
VERSE
ChargedAttack
player_state <suspends> void
# charge up, unless we get hit first
race
block
Sleep
true
block
Await
false
if
FireProjectile
else
PlayStagger


# Page. 38

![Page Image](https://bcdn.docswell.com/page/27V4MDWPEQ.jpg)

PERSI ST ENC E
survives sessions
player_progress
class<final><persistable>
int
1
int
0
# saved for each player, loaded when the player joins
var
weak_map player
AddCoins
player
Progress
int <transacts> void
or player_progress
player_progress
if
set Progress
ShowCoins
player_progress
map


# Page. 39

![Page Image](https://bcdn.docswell.com/page/5JG1GYDQ7L.jpg)



# Page. 40

![Page Image](https://bcdn.docswell.com/page/47QDXM1WEP.jpg)

SC ENE GRAPH
a tree of entities
vault_controller_component
door_component
pressure_plate_component
EP_Vault prefab
door_component
EP_Vault


# Page. 41

![Page Image](https://bcdn.docswell.com/page/KE4Z6VR1J1.jpg)

SC ENE GRAPH
a Verse class
hello_component<public>
class<final_super> component
@editable Message<public> string
OnBeginSimulation<override>
OnSimulate()<suspends>
super
"Hello from Verse"
void
OnBeginSimulation
Print
OnSimulate<override>
<suspends> void
loop
Sleep 5.0
Print "Still running"


# Page. 42

![Page Image](https://bcdn.docswell.com/page/L71RV3Q57G.jpg)

SC ENE GRAPH
in Verse
pressure_plate_component
pressure_plate_component<public>
@editable HoldTime<public> float
OnSimulate<override>
if
class<final_super> component
2.0
<suspends> void
GetComponent mesh_component


# Page. 43

![Page Image](https://bcdn.docswell.com/page/G7W1LPMWJ2.jpg)

SC ENE GRAPH
in Verse
pressure_plate_component
pressure_plate_component<public>
@editable HoldTime<public> float
OnSimulate<override>
class<final_super> component
2.0
<suspends> void
if
GetComponent mesh_component
loop
Await
race
block
Await
false
block
Sleep
true


# Page. 44

![Page Image](https://bcdn.docswell.com/page/4JZPMKQ273.jpg)

SC ENE GRAPH
in Verse
pressure_plate_component
pressure_plate_component<public>
@editable HoldTime<public> float
OnSimulate<override>
class<final_super> component
2.0
<suspends> void
if
GetComponent mesh_component
loop
Await
race
block
Await
false
block
Sleep
true
if
SendUp plate_activated_event


# Page. 45

![Page Image](https://bcdn.docswell.com/page/YE6MNQN6JV.jpg)

SC ENE GRAPH
through the tree
plate_activated_event<public>
vault_controller_component
class scene_event
# pressure_plate_component, on the plate
SendUp plate_activated_event
pressure_plate_component
door_component
door_component
SendUp


# Page. 46

![Page Image](https://bcdn.docswell.com/page/GE5Z5R5574.jpg)

SC ENE GRAPH
through the tree
plate_activated_event<public>
vault_controller_component
OnReceive
class scene_event
# pressure_plate_component, on the plate
SendUp plate_activated_event
pressure_plate_component
SendUp
# vault_controller_component, on the arena
OnReceive<override>
if
scene_event
logic
plate_activated_event
OpenAllDoors
true
door_component
else
false
door_component
# handled: stop here


# Page. 47

![Page Image](https://bcdn.docswell.com/page/972RNDNGER.jpg)

SC ENE GRAPH
through the tree
plate_activated_event<public>
vault_controller_component
OnReceive
class scene_event
# pressure_plate_component, on the plate
SendUp plate_activated_event
pressure_plate_component
SendUp
# vault_controller_component, on the arena
OnReceive<override>
if
scene_event
logic
plate_activated_event
OpenAllDoors
door_component
true
found
# handled: stop here
else
false
OpenAllDoors
door_component
void
FindDescendantComponents door_component
found
for
Open


# Page. 48

![Page Image](https://bcdn.docswell.com/page/DJYDP2PGJM.jpg)

SC ENE GRAPH
a Verse class
GENERATED IN ASSETS. DIGEST.VE RSE
EP_Vault
# simplified: access specifiers and import paths left out
class<final><concrete> entity
door_component
class<final> mesh_component
@editable
var
material
external
I N YOUR CO DE
# the whole prefab
AddEntities array
# now in the scene


# Page. 49

![Page Image](https://bcdn.docswell.com/page/V7N6585878.jpg)

SC ENE GRAPH
In design
written in Verse
I N VERSE (SYNTAX NOT FINAL )
vault
prefab
class entity
Door<entity_field> entity
entity
Mesh<component_field>
door_component
Logic<component_field> door_component
Alarm<entity_field> entity
entity
Sound<component_field> sound_component
var
Loot<entity_field> entity
# only some vaults
optional


# Page. 50

![Page Image](https://bcdn.docswell.com/page/YJ9LYKYXE3.jpg)



# Page. 51

![Page Image](https://bcdn.docswell.com/page/GJ8X6R697D.jpg)

WH AT ' S NEXT
Vision
massive shared simulations
One shared Verse simulation


# Page. 52

![Page Image](https://bcdn.docswell.com/page/LJL89K9MER.jpg)

WH AT ' S NEXT
Unreleased
reactive code
L IVE VARI ABL ES
var
REACTI NG TO CHANGE
int
0
var live
int
set
5
var
1
int
100
# X now tracks Y
# X is now 6
upon
0
# once, when it first holds
Print "Player died!"
when
# every time it changes
SetHealthBar
await
100
# suspend until healed


# Page. 53

![Page Image](https://bcdn.docswell.com/page/47M6Z2Z6JW.jpg)

WH AT ' S NEXT
Unreleased
prediction
HandleJump
<predicts> void
StartJumpAnimation
# runs now, on the client
PlayJumpSound
PerformJump
# the server validates


# Page. 54

![Page Image](https://bcdn.docswell.com/page/P7RP6M6NJ9.jpg)

WH AT ' S NEXT
Forward-looking
coming
In progress
On the roadmap
Planned


# Page. 55

![Page Image](https://bcdn.docswell.com/page/PJX3MVM87X.jpg)

GO BUI L D
learn Verse
BO O K
DO CS
FO RUM S
CO M M UNI TY
API
AL L L I NK S


# Page. 56

![Page Image](https://bcdn.docswell.com/page/3JKYGQGL7D.jpg)

THAN K YO U