Operation Sea Lion
Joni Nuutinen Strategy
Highly rated turn-based strategy game: Operation Sea Lion 1940
- Rating
- 3.1
- 52 ratings
- Downloads
- 1K+
- on Google Play
- Price
- $4.90
- No in-app purchases
- Updated
- Sep 10
- 2026 · v5.2.1.0
Screenshots
About Operation Sea Lion
Operation Sea Lion 1940 is a turn based strategy game set on the southern part of the United Kingdom during the Second World War.
You are in command of the German landing forces attempting to -- against all the odds -- invade the United Kingdom by crossing the English Channel. The campaign is a logistic struggle to keep enough supplies flowing, in spite of the growing British Naval supremacy,to give German Army a fighting chance.
FEATURES:
+ Historical accuracy: Campaign mirrors the historical setup.
+ Long-lasting: Thanks to in-built variation and the game's smart AI technology, each game provides a unique war gaming experience.
+ Competitive: Measure your strategy game skills against others fighting for the Hall of Fame top spots.
+ Supports casual play: Easy to pick up, leave off, continue later.
+ Good AI: Instead of just attacking on direct line towards the target, the AI opponent balances between strategic goals and smaller tasks like encircling nearby units.
+ Settings: Various options are available to alter the look of the gaming experience: Change difficulty level, hexagon size, Animation speed, choose icon set for units (NATO or REAL) and cities (Round, Shield, Square, block of houses), decide what is drawn on the map, and much more.
+ Tablet friendly strategy game: Automatically scales the map for any physical screen size/resolution from small smartphones to HD tablets, while settings allow you to fine tune hexagon and font sizes.
+ Inexpensive: The classic strategy game campaign for a cup of coffee!
In order to be a victorious general, you must learn to coordinate your attacks in two ways. First, as adjacent units give support to an attacking unit, keep your units in groups in order to gain local superiority. Secondly, it is rarely the best idea to use brute force when it is possible to encircle the enemy and cut off its supply lines instead.
If you want to test this WWII strategy game, a free 20-turn version is also available from the app store.
Join your fellow strategy gamers in changing the course of the Second World War!
Privacy Policy (full text on website and app menu): No account creation is possible, the made-up username used in the Hall of Fame listings is not tied to any account and does not have password. Location, personal, or device identifier data is not used in any way. In the case of crash the following non-personal data is sent (vie web-form using ACRA library) to allow quick fix: Stack trace (code which failed), Name of the App, Version number of the App, and Version number of the Android OS. The app only requests the permissions it needs to function.
Conflict-Series by Joni Nuutinen has offered highly rated Android-only strategy board games since 2011, and even the first scenarios are still actively updated. The campaigns are based on the time-tested gaming mechanics TBS (turn-based strategy) enthusiasts are familiar with from both the classic PC war games and legendary tabletop board games. I want to thank the fans for all the well thought-out suggestions over the years which have allowed these campaigns to improve at a much higher rate than what any solo indie developer could dream of. If you have feedback about this board game series please use email, this way we can have a constructive back and forth chat without the limits of the store's comment system. In addition, because I have huge number of projects on multiple stores, it’s just not sensible to spend handful of hours each day going through hundreds of pages spread all over the Internet to see if there is a question somewhere -- just send me an email and I will get back to you. Thanks for understanding!
You are in command of the German landing forces attempting to -- against all the odds -- invade the United Kingdom by crossing the English Channel. The campaign is a logistic struggle to keep enough supplies flowing, in spite of the growing British Naval supremacy,to give German Army a fighting chance.
FEATURES:
+ Historical accuracy: Campaign mirrors the historical setup.
+ Long-lasting: Thanks to in-built variation and the game's smart AI technology, each game provides a unique war gaming experience.
+ Competitive: Measure your strategy game skills against others fighting for the Hall of Fame top spots.
+ Supports casual play: Easy to pick up, leave off, continue later.
+ Good AI: Instead of just attacking on direct line towards the target, the AI opponent balances between strategic goals and smaller tasks like encircling nearby units.
+ Settings: Various options are available to alter the look of the gaming experience: Change difficulty level, hexagon size, Animation speed, choose icon set for units (NATO or REAL) and cities (Round, Shield, Square, block of houses), decide what is drawn on the map, and much more.
+ Tablet friendly strategy game: Automatically scales the map for any physical screen size/resolution from small smartphones to HD tablets, while settings allow you to fine tune hexagon and font sizes.
+ Inexpensive: The classic strategy game campaign for a cup of coffee!
In order to be a victorious general, you must learn to coordinate your attacks in two ways. First, as adjacent units give support to an attacking unit, keep your units in groups in order to gain local superiority. Secondly, it is rarely the best idea to use brute force when it is possible to encircle the enemy and cut off its supply lines instead.
If you want to test this WWII strategy game, a free 20-turn version is also available from the app store.
Join your fellow strategy gamers in changing the course of the Second World War!
Privacy Policy (full text on website and app menu): No account creation is possible, the made-up username used in the Hall of Fame listings is not tied to any account and does not have password. Location, personal, or device identifier data is not used in any way. In the case of crash the following non-personal data is sent (vie web-form using ACRA library) to allow quick fix: Stack trace (code which failed), Name of the App, Version number of the App, and Version number of the Android OS. The app only requests the permissions it needs to function.
Conflict-Series by Joni Nuutinen has offered highly rated Android-only strategy board games since 2011, and even the first scenarios are still actively updated. The campaigns are based on the time-tested gaming mechanics TBS (turn-based strategy) enthusiasts are familiar with from both the classic PC war games and legendary tabletop board games. I want to thank the fans for all the well thought-out suggestions over the years which have allowed these campaigns to improve at a much higher rate than what any solo indie developer could dream of. If you have feedback about this board game series please use email, this way we can have a constructive back and forth chat without the limits of the store's comment system. In addition, because I have huge number of projects on multiple stores, it’s just not sensible to spend handful of hours each day going through hundreds of pages spread all over the Internet to see if there is a question somewhere -- just send me an email and I will get back to you. Thanks for understanding!
What’s new
Version 5.2.1.0 · Updated September 10, 2026
+ Setting: Zoom out when artillery unit is selected + Fix: A handful of settings might have flipped values (cliffs, airstrikes, waypoint, HOF-double-filter, unit icons size per MP/HP)
User reviews
This simulated 'what if' scenario is another superb game from a developer who has achieved an excellent balance of playability and authenticity. I imagine many strategy fans who are used to flashy graphics and pinch and zoom interfaces will but be put with the basic 2d interface on the screenshots and get no furthe...
Just got this and played one. Awesome mechanics. More detailed than Joni's other games, but still intuitive and easy to learn.
I have played many of Joni's games. They take me back to long days with the Avalon Hill classics. First time I tried Sea Lion I thought it was close to impossible. Let me just say that you are pretty likely to hit some tight supply situations and if you are not managing the naval side well, you are in for some pain!...
I have managed to capture England once so far. Great game.
Out of all Nuutinen's games, this is my favorite. Simulates air, sea and land operations without onerous rules or bookkeeping. Playability is high and even has difficulty levels so you can play an AI that definitely ate its Wheaties! Playing on Very Hard setting now and it is living up to its name. Fascinating histo...
Thanks once again, Joni. The supply feature is an extra challenge and a great touch.
Alternatives to Operation Sea Lion
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| App | Rating | Price | Installs | Last updated | Compare |
|---|---|---|---|---|---|
| Operation Sea Lion | 3.1 / 5 | $4.90 | 1,000+ | Sep 10, 2026 | |
| Axis Endgame in Tunisia | – | 4.99 USD | 100+ | Sep 18, 2026 | Compare |
| Dieppe Raid | – | 4.99 USD | 100+ | Aug 28, 2026 | Compare |
| Utah & Omaha | 4.8 / 5 | 4.99 USD | 500+ | Aug 28, 2026 | Compare |
| Juno, Sword, 6th Airborne | 4.8 / 5 | 4.99 USD | 100+ | Aug 31, 2026 | Compare |
| Great Patriotic War | – | 4.99 USD | 100+ | Oct 29, 2020 | Compare |
| Fall of Army Group Center | – | 4.99 USD | 100+ | Sep 13, 2026 | Compare |
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