
Cerulean Invasion is an engaging BL / Yaoi / Gay / Bara / Queer / NSFW (18+) visual novel featuring space cadets and enticing romance. Follow our characters as they embrace their sexuality and explore their newfound romance.
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About
Cerulean Invasion is an engaging BL / Yaoi / Gay / Bara / Queer / NSFW (18+) visual novel featuring space cadets and enticing romance. Follow our characters as they embrace their sexuality and explore their newfound romance.

In the aftermath of the Prothinian invasion of a lunar colony, citizens are conscripted to protect mankind from the alien aggressors. Journey through the eyes of Alexis as he navigates through the ripple effects of war, forming close bonds with his comrades — Osman, Evan, and Leon — along the way.
Engaging Story: ≈75k words (approx. 6 hours of play)
Stunning Original Artwork: Sprite and CG art by Zinq
Detailed CGs: 20+ CGs (not counting variations)
18+ Scenes (incl. threesome)
In-Game Achievements
And so much more!
Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English
Engagement
Hours played at review time, across 20 reviews with recorded playtime.
Reviews
An unfortunate disappointment. Instead of a full game, it is just a third of a game. Unless the rest of the game is included in the price, it is definitely not worth it. There are missing words and other oddities within the texts, and the quality of the writing is less than ideal to put it nicely. It is superficial and feels really immature. Based on the free demo, I was expecting better. The graphics are ok, but that's it. The lack of substance and depth are a big no no. The relationships between the characters feel forced (because they are), there is no romance, no foreplay, and no option to opt-out. Apparently you are in love with everyone and everyone loves you right back and no-one finds its weird or insulting that you poke, or are being poked by, everyone you befriend despite all of them apparently being in love with you...it's just bad lazy writing.
I bought the game. First look - nice. But the small font was the reason i asked refund for this game. I'm a guy with very severe visual impairment, and the font size was very small and impossible to read even with my glasses. There are no options in the settings to increase the font (like most Visual Novel games) so it's what it is. if you want to buy, please. just take this in mind.
🎮 Gameplay & Genre Cerulean Invasion is a straightforward visual novel with light branching, clocking in at just under four hours for a full first playthrough (I ended up with Leon, but wanted Osman, so I think I made a wrong choice somewhere along the way). Choices focus on relationship development and scene access rather than complex route-locking, which keeps the pacing tight and accessible, but I did find myself wanting more branching overall. There were several moments where the story felt like it was building toward a decision point and then simply kept going with no choice offered, which was genuinely disappointing. I also understand the tradeoff here, because deeper branching quickly becomes more technically demanding and harder to polish, and this entry is clearly prioritizing a smoother, more cohesive first installment. The structure is cleaner and more confident than Red Ops, and while in-game achievements exist (an improvement over Red Ops), Steam achievements are not currently enabled, which feels like a missed opportunity given the improved systems. 🔥 M/M Content This is fully MLM, without hedging or ambiguity. All primary characters are men who are clearly into men, and the fantasy never pretends otherwise (thankfully!). There are three love interests, and while it is unclear whether full exclusive romance routes are implemented, you can have sex with all three. The CGs are explicit, polished, and confident, including group content. Body types skew heavily toward jock soldier builds with little diversity, but the uniformity fits the space-military setting rather than feeling like lazy defaulting. 🎨 Visuals & Style The visuals are unapologetically sexy, with consistently muscular jock builds that fit the space-military setting well. Character sprites emphasize broad shoulders, solid frames, and physical confidence, and the CGs lean fully into that appeal. Anatomy is generous without tipping into absurd proportions (though I'm all for that when it fits the context), with large but believable ♥♥♥♥♥ that feel intentionally drawn rather than exaggerated for shock value. Overall polish is strong, and the art direction feels more assured than Red Ops, making both the erotic and narrative moments land much more effectively. 🗣️ Tone & Writing The writing and story feel more developed than Red Ops and I genuinely enjoyed the storyline. The sci-fi setting pairs especially well with MLM romance in a way that feels both escapist and character-driven, and it’s a combo that really works for me. Character interactions are warmer and more confident, with relationships that read as genuinely friendly rather than purely transactional. Even with a wartime backdrop, the narrative keeps its focus on connection and emotional continuity. As Part One of a planned trilogy, this installment tells a complete story arc while clearly laying groundwork that makes you want the next chapter. 👍 Best Thing The emotional tone. The camaraderie and intimacy between characters feel earned, not rushed, which elevates both the romance and the sex. 👎 Worst Thing No Steam achievements (yet?). Given the inclusion of in-game achievements and the polish elsewhere, this omission stands out. ⭐ Final Verdict Recommended. Cerulean Invasion improves meaningfully on Red Ops in writing, presentation, and emotional clarity, delivering confident MLM sci-fi romance that knows exactly who it’s for and doesn’t apologize for it. I also curate a Steam page reviewing M/M games if you’re looking for more titles in this space: https://store.steampowered.com/curator/45790038/
I love the growth and progress this new studio is making with each game. Cerulean Invasion is even better than their first game Red Ops, with a lot of attention to detail, gorgeous backgrounds, and solid writing. This is a creator who absorbs feedback like a sponge and uses it to learn and grow. If they're this good already I can just imagine the heights they'll reach in the future. The genuine and positive main character reads as very Canadian to me, and that make sense, since its a Canadian studio. Extremely upbeat, positive, and not jaded. It was a very fun game to play and I look forward to having more time to get into it. If you’re a fan of 18+ queer visual novels , this is absolutely one to check out. You won't be disappointed.
Довольно миленькая порно-история. Мне нравится рисовка, эротические сцены тоже неплохи. Главный минус это максимальная линейность игры, иллюзия выбора. Я думала, что тут три любовных интереса, но нет. Возлюбленный гг это Леон, он будет с ним всегда и при любом раскладе. Розоволосый Эван и смуглый Осман просто факбаддис, более того, Эван в одной из экстер будет с младшим братом Леона. Выбора в игре настолько нет, что когда персонажи играю в правду или вызов гг сам решает "выбрать" правду, то есть мы, как игроки, вообще не имеем никакого контроля над историей, можно разве что выбрать в какой позе шпехаться, да и там выбор из двух вариантов х)
Fantastic CG's and backgrounds, great attention to detail, it's obvious the artist and writers have put in a lot of work to deliver such beautiful artwork. I've only played half an hour so far but have enjoyed it a lot!
Look, this game starts REALLY strong. I loved Omar and specially Evan. A really nice duo. And the first scene with Omar and specially the threesome scene are GREAT. Great beggining. But the entire vibe of the game shifts, in my opinion to the worse, with the Leon commander. Yes, yes, he´s in the cover art. But I do think it kinda ruins the mood for the MC to immediatly declare undying love for him (the following day to the threesome funnily enough). Yes yes artistic vision, but I still think it would have been better if they had allowed us to pick between the three of them.
Oh my my my! I've only played 2 chapter thus far... and let me tell you, it's 🌶️🌶️🌶️🌶️🌶️🌶️🌶️!!! THE D IS ON FULL DISPLAY! I REPEAT THE D IS ON FULL DISPLAY! ALERT THE AUTHORITIES! Characters are great, artwork is 💋, fast-paced; this is for folks who enjoy adult content, but has a story behind it. It's not perfect, but it beats most of what's out there. (I'll update the review as I play along)
I would generally say I enjoyed it, but it felt incomplete both in the romance aspect and the overall plot. It felt like I only played maybe 1/3rd or 1/4 of a game. Everything I played was amazing, but the romances didn't really branch out or develop individually and the story just dead stopped. You don't even really decide who your with, the game just decides you have one (maybe) boyfriend, but you still have sex with other people. It was overall confusing from that perspective. I'd still say it's worth playing, the art is great and the characters are genuinely fun. I really love them, but I'd keep some realistic expectations, since the character stories and overall plot doesn't actually go anywhere. Hopefully we get more to actually wrap things up and develop the story that's here because there is potential.
Cerulean Invasion is a no-nonsense, no-drama, fun BL VN with awesome outfit designs and LOTS of pure, unadulterated gay sex. It's entertaining, light-hearted, and often lets you choose whether you want to top or bottom your love interest (!). The art is really cool, especially the sci-fi getups and the army suits (paper-thin and skin-tight — aka pure eye candy!). Leon’s hilarious lines and his screaming face are the cherry on top. So if you're not looking for an emotional roller coaster and simply want to enjoy your men in their pure form (whose bodies and packages are drawn with so much love!), go for it!
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Concurrent players on Steam, sampled daily since tracking started.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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