1-1: Heart of the Sunrise
| 1-1: HEART OF THE SUNRISE | |||
|---|---|---|---|
| |||
| General | |||
| Layer & Part | LIMBO /// FIRST | ||
| Challenge | Complete the level in under 10 seconds. | ||
| Music | A Thousand Greetings A Shattered Illusion | ||
| Tip of the Day | |||
Some enemies make idle sounds to make them easier to track.
| |||
| Collectables | |||
 4 Soul Orbs 1 Blood Orb Attractor Nailgun Alternate Revolvers Slab I
| |||
| Enemies | |||
 24 Filth 27 Strays 6 Schisms 28 Drones 1 Malicious Face
| |||
| Rank Requirements | |||
| Rank | Time | Kills | Style |
| S | 04:30 | 76 | 8,000 |
| A | 05:00 | 70 | 7,000 |
| B | 06:00 | 60 | 5,000 |
| C | 08:00 | 40 | 2,000 |
1-1: HEART OF THE SUNRISE is the first level of Limbo, which introduces the Drone, Skull Keys, and the Nailgun. 1-1 also houses the entrance to Limbo's secret level: 1-S: The Witless. The songs used are A Thousand Greetings for the introduction and A Shattered Illusion once enemies start spawning.
Level
Start
Starting off the level, the player enters a bright outdoor plaza dotted with trees, stone pillars and flowers, along with a fountain in the middle. However it quickly reveals that the outdoor scenery is an illusion: with the sky produced from screen walls, the foliage being blocky and artificial, and various nature sounds and bird calls being played from hidden speakers.
Two doors are situated to the right and back walls of the room. Inside the far door lies a Red Pedestal and a locked door, and the right door containing a long stone hallway lined with torches.
Heading through the right doorway will lead to a large room with more stone pillars and architecture, with a large stone tower housing a Red Skull Key, along with a blue pedestal further back. Walking up to the Red Skull Key will then trigger a prompt to appear on how to pick up items:
Doing so will grab the skull from the pedestal and put it into the player's hand, with normal melee function being unaffected.
Shattered Illusion
Returning back to the room with the Red Pedestal, placing the Skull Key on top will unlock the previously un-openable door, leading through a short hallway into a long corridor a stone cliff-face and a waterfall.
Walking forward into the room will then cause the doors to lock, before introducing the player to the Drone: small flying enemies that dodge around the player and fire bursts of Hell Orbs, along with dive bombing towards the player on death.
2 Drones will spawn in front of the player on the first wave, with 4 more Drones spawning in once the first two are killed.
Moving forward into the next room leads into a long hallway with a river and small bridge, with a door at the far end of the room. Heading towards the bridge will spawn in 3 Drones, with a larger wave of 2 Drones and 4 Schisms spawning nearby the door.
Castle
Exiting out of the door leads into a large interior stone room, within the center lying the Attractor Nailgun, placed on a bed of flowers. Picking up the Nailgun will then spawn a Malicious Face nearby for the player to test it on.
To the left of the chamber lies a staircase leading up to the door forward, with walking up towards it spawning in 4 Strays nearby the door.
The door ahead then leads into a long stretch of hallway, lined with carpet, stained glass, and pillars. Approaching the end of the hallway will then trigger a prompt on the Attractor Nailgun's ability to create traps around the environment:
be attached to the environment to create traps.
A large wave will then spawn as the player heads to the end of the hallway, consisting of 14 Filth, 4 Strays, and 4 Drones.
Returning Path
After the hallway, the path then returns back outdoors to a small room housing a Blue Skull Key, which upon collecting opens a door back into the waterfall arena, with the player now required to head back to the start of the level. Heading into the entrance to the waterfall arena will spawn in 2 Drones, with returning to the starting room spawning a wave of 8 Filth and 3 Strays.
Returning through the hallway leading to the blue and red pedestals will spawn a group of 4 Strays in front of the player before making it into the next room. Heading towards the Blue Pedestal and placing the Skull Key will unlock a nearby door, leading into a small cathedral-like hallway. Walking forward will trigger a wave of 8 Strays and 2 Drones.
End
After the hallway lies a small room housing the Exit Elevator, with inside the room containing a flowerbed, pillars, and a skylight in the middle of the ceiling. Approaching the door will trigger a wave of 4 Strays and 2 Schisms, with 6 Drones spawning in once the first wave has been killed.
Once all the enemies have been defeated, the Exit Elevator will open and unlock the end of the level.
Challenge
For this level's challenge, the player needs to find a hidden secret exit situated in the first room in order to clear it under 10 seconds. This secret exit lies underneath the fountain situated in the middle of the room, which requires the 
Marksman Revolver to activate by tossing a coin into the fountain. If done correctly the fountain will slide out to reveal the exit. If done quick enough, the challenge will be completed. This secret exit then takes the player to 1-S: The Witless.
Secrets
For the level's secret exit, see the Challenge section above, as it covers the same topic.
| #1 | Soul Orb - In the room housing the Red Pedestal and the locked door to the waterfall arena. To the left wall lies a pillar leaning up against the screen, with a discolored patch of the screen nearby. Walking into the patch will lead into a small hole with the Soul Orb.
|
 
|
| #2 | Soul Orb - In a room connecting to the Red Pedestal room. Within the same room as the first Soul Orb lies a door by the left wall, which leads into a tall room with a large stone tower. Climbing up to the top by jumping up will reveal a Soul Orb at the top of the tower.
|
|
| #3 | Blood Orb - Within the Waterfall arena where Drones are introduced. Heading through the waterfall that sits at the left side of the room will reveal it to be a hologram covering up a small room housing the Blood Orb. Walking towards it will spawn 3 Drones in front of the player.
|
|
| #4 | Soul Orb - In the hallway after the introduction to the Nailgun in the Castle. Lining the walls of the hallway lie rows of lit stained glass paintings, with one of them being unlit. Walking into the painting will reveal the Soul Orb behind it.
|
 
|
| #5 | Soul Orb - In the second to last arena, sitting above the entrance by the right-hand side, with the Soul Orb hidden in a small nook.
|
|
Slab I
Hidden through each of the levels in Limbo lies a set of stone slab buttons, which are revealed after finding hidden secrets or completing optional challenges. Collecting all four slabs grants the player an unlockable variant to their 
Revolver in 1-4: Clair de Lune, the 
Alternate Revolver or the "Slab" Revolver.
The first Slab is located above the final arena, accessed by breaking the glass skylight within the center of the room and jumping through it into a room above. Pressing the Slab will then cause it to light up, before a prompt then appears below:
motion.
Trivia
The title of the level is a reference to "Heart of the Sunrise" from the album Fragile by Yes.
