Erica: Knight of the Sun is an adult adventure game made by MorquendiX with Unity. It uses animated 2D CG artwork and side-scrolling play, centered on fantasy, combat, and platforming. You play Erica, who starts an adventure and runs into an ugly bastard, with the story continuing through the game’s areas.
The latest listed build is v0.2.0, released on September 12, 2026. Development is ongoing, and the game runs on Windows in English without censorship. The changelog includes v0.1.9.2 and v0.1.8.0, with v0.1.8.0 adding eighteen new areas, including catacomb, cave, corpse pit, and dark chamber locations, plus main interface changes, three monster types, eight items, three alchemy recipes, nine quest lines, five gallery cutscenes, two gallery illustrations, and five in-game scenes.
Developer's description
Erica embarks on an adventure but encounters an ugly bastard. Play this game to discover what happens.
v0.2.0
N/A
v0.1.9.2
v0.1.8.0
18 new areas have been added.
「Underground Catacomb Passage」
「Underground Catacomb Corridor I - III」 (1~3)
「Another Path」
「Underground Catacomb I - X」 (1~10)
「Dark Chamber」
「Deep Cave」
「Corpse Pit」
Main UI Changes
Ero stat images now change based on the number of experiences for each body part.
The values from Goddess Blessings (Ability Unlocks) are now applied to Erica’s stat text.
New Monsters (3 types)
「The Cursed」
「Kaiser」
「Kaiser’s Real Eye」
New Content
8 new items added
3 new alchemy recipes added
9 new quest lines added
Oasis x2
Monaca x4
Cooper x3
Cooper’s quest can be found in 「Underground Prison II」
Gallery
5 new gallery cutscenes
2 new gallery illustrations
In-game Content
5 new in-game scenes added These can be viewed by progressing quests or under specific conditions.
New Goddess Blessings (Abilities)
Blessing of the Sun - Increases the wearer’s attack when unlocked. Grace of the Sun - Increases the wearer’s defense when unlocked. GoldenClaw - Unlocks the active skill "Golden Claw".
v0.1.7.1
Fixed a bug where the moon in Stage 1 was glowing too brightly.
Fixed the Miles bug in Stage 2.
Fixed the Sunherb bug in Stage 2.
Fixed a bug that was blocking cheat codes.
v0.1.7
New Content
9 new areas have been added.
「Monaca's Room」
「Kaiser's Room」
「Prison corridor」
「The central hall of the prison」
「Underground prison I」
「Underground prison II」
「Underground prison III」
「Underground prison cellar」
「Entrance to an underground cemetery」
UI Changes
The stat section of the main UI has been updated.
On the left side of the main UI stat panel, you can now check the number of times Erika has been H-acted upon.
(If you played previous versions, past actions are not recorded. The count will start only from a new save or from now on.)
(If you wish to play as Erika in a “Virgin” state, please check the Virgo constellation displayed behind the stat UI.)
On the right side, you can view Erika’s current duty as the Knight of the Sun (Main Quest) and her current thoughts (Sub Quests).
Before entering the Stage 1 boss battle, the destination is now clearly indicated.
New Enemies & NPC Content
A new enemy, 「Executioner」, has been added.
Related H-scenes have also been added. (Gallery support will be added later.)
A new neutral monster, 「Rat」, has been added.
An 「in-game H situation」 related to NPC Vestia has been added.
This can be viewed after completing all of Vestia’s quests.
Related scenes have been added to the gallery.
An 「in-game H situation」 related to NPC Monaca has been added.
This can be unlocked by meeting certain conditions.
Related scenes have been added to the gallery.
Systems & Balance
5 new items have been added.
2 new alchemy recipes have been added.
A pattern puzzle has been added to the prison area.
Enemy attack intervals have been generally shortened.
Jump input delay has been reduced.
Script and rendering optimizations have been implemented.
v0.1.6
1 new area has been added.
Underground Cemetery Entrance
A Notice feature has been added to the UI for gallery unlocks and events / achievements. (When certain conditions are met through specific actions, a notice will appear at the top of the screen. Notices will not appear again if the content has already been unlocked.)
New NPCs (2)
Vestia
She is Miles’s maid living in the Forgotten Village.
She is obsessively in love with Miles and seems willing to do anything for him.
Monaca
She is a nun living in the Forgotten Village.
Before the moonlight changed people, she managed the cathedral located in the underground cemetery.
It is said that the men of the village visited the cathedral just to admire her aggressively voluptuous body.
Additional Content
New cutscenes related to the tavern “The Rolling Stone” have been added. (When the minigame revenue exceeds 2000 points, an achievement is unlocked and the cutscene plays automatically.)
A new monster “Miserable Tentacle” has been added. (Tentacles appear in the Bridge of Misery.)
2 new cutscenes have been added to the Gallery.
Tutorials have been added.
Script optimization and animation optimization have been performed.
v0.1.3
N/A
v0.1.0
Initial Release
Player reviews
Player rating3.0 / 5 · 18 ratings
Written reviews18 · avg 3.0★
Positive (4–5★)39%
Latest review2026-07-17
What players say
Most reviews are negative, citing grind, bugs, and controls despite good pixel art.
5★2
4★5
3★3
2★7
1★1
Players like
Good pixel art and visual atmosphere
Character designs and animations are praised
Some H-scenes and gallery are liked
Promising exploration and early demo content
Common complaints
Heavy grinding and fetch quests
Frequent crashes, bugs, and softlocks
Unintuitive controls and inconsistent UI
Best for players who like pixel art adult side-scrollers despite rough gameplay.
Summarised from 18 written player reviews.
kazazaky2026-07-17★★★★★
It was Okay ,for game is nothing to crazy just basic Side scroller not to grindy ,but i just wish about the Gallery CG scene is have same Quality like the the Illust one ,the Scene CG is meh at…
D1sp0s4ble2026-07-04★★★★★
The art and animations are good, but the gameplay is very very unfun and broken. The quests revolve around gathering a certain number of items; whether that's enemy drops, items bought at a shop, money or plants & mushrooms. The…
Yofeldask2026-06-10★★★★★
ugh... 3 outta 5. and that me being generous (v0.1.9.2) visuals are doing some heavy lifting in this game - overall style, atmosphere, sprites (especially bosses and their vfx). too bad H-scenes are few and mediocre. if you're downloading this…