Compare Aegis of Earth: Protonovus Assault prices across 50+ stores and find the best deal. Developed by ACQUIRE Corp.. Published by Aksys Games. Released on 7/18/2016. Available on PC. Genres: Strategy.

Rotating cities, missile launchers, kaiju waves, and a JRPG soap opera you'll be skipping in five minutes. Worth a look if your tower-defense backlog has a gap at the bottom.

My first thought when I saw the core hook here was genuine interest: you defend not a grid of towers but a single circular city made of independently rotating rings, and you spin those rings mid-battle to bring cannons, missile launchers, gatling turrets, and laser arrays to bear on whatever is closing in from that direction. As a strategic puzzle, the rotation mechanic has real promise. The problem is the game figures out its own answer in about two hours and never asks a harder question again. The loop splits cleanly into two phases. Between battles you manage the city: place residential blocks to grow your tax base, keep generators running so weapons stay online, research upgrades, assign crew members to posts, and accept side tasks for bonus rewards. It is light city management, not deep sim, but the interconnected systems are pleasant to poke at early on. Then the assault phase kicks in and you spin rings to angle weapons at incoming Protonovus creatures while watching the health bars drain. Cannons are reliable all-rounders, missiles hit harder with worse accuracy, gatling turrets spray suppressive fire, and lasers track enemies automatically within range. Merging weapon slots can create upgraded combined emplacements. On paper, that gives you meaningful build decisions. In practice, stacking merged missile launchers in a rough 360-degree spread breaks most encounters before they develop any tension. Critics noted you can practically step away from the controller during a mid-game assault and come back to a city still standing. That is not a difficulty-curve design, that is an absence of one. The PC port arrived after the console versions and brought some of its own friction. Controller implementation was handled sloppily, the rotation controls can be fiddly when you need to switch between rings quickly without accidentally cycling to the wrong layer, and the visual fidelity was already being compared to a prior hardware generation on release. None of this is a dealbreaker if you are going in with low expectations, but it does mean the PC version is not a cleaned-up upgrade over the PlayStation release. Cloud saves and controller support are present, which helps. Where the game genuinely loses people is the anime visual-novel wrapper around every mission. The cast is a collection of loud archetypes, the dialogue goes long, and the voice-acting is used sparingly enough that you will read far more than you hear. Skipping through cutscenes becomes habitual. Underneath all that noise, there is a crew progression layer where team members earn experience and you praise standout performers after each battle to raise their morale and stats, which is a low-friction RPG touch that fits the bite-sized session structure better than the padding around it. Who should actually consider this? If you have exhausted Dungeon Defenders, Defense Grid, and Fieldrunners and want something with a mechanical wrinkle you have not seen, the rotating-ring system is genuinely distinct. It suits short sessions, and some players report settling into a low-stakes rhythm that works precisely because it does not demand much. If you want a challenge that scales, a deep weapon tree that rewards optimization across a campaign, or production values that hold up to modern comparisons, this will not satisfy. The upgrade research is shallower than it looks, the enemy variety runs thin by mid-campaign, and the story will not fill that gap. Call it a curio from 2016 that had one good idea and spent its budget on anime voice clips instead of building the strategy layer those rings deserved. Diego, Scout Team

Aegis of Earth: Protonovus Assault
Strategy

Aegis of Earth: Protonovus Assault

Jul 18, 2016ACQUIRE Corp.Aksys Games
GamerScout Says

Rotating cities, missile launchers, kaiju waves, and a JRPG soap opera you'll be skipping in five minutes. Worth a look if your tower-defense backlog has a gap at the bottom.

PC
Best Price Available
0.00
at N/A
Historical low: $2.87

Compare Prices(0 stores)

Loading prices...

We may earn a commission when you buy games through links on this page — at no extra cost to you. It never affects our rankings or verdicts.

Screenshots & Media

Screenshot

About Aegis of Earth: Protonovus Assault

My first thought when I saw the core hook here was genuine interest: you defend not a grid of towers but a single circular city made of independently rotating rings, and you spin those rings mid-battle to bring cannons, missile launchers, gatling turrets, and laser arrays to bear on whatever is closing in from that direction. As a strategic puzzle, the rotation mechanic has real promise. The problem is the game figures out its own answer in about two hours and never asks a harder question again. The loop splits cleanly into two phases. Between battles you manage the city: place residential blocks to grow your tax base, keep generators running so weapons stay online, research upgrades, assign crew members to posts, and accept side tasks for bonus rewards. It is light city management, not deep sim, but the interconnected systems are pleasant to poke at early on. Then the assault phase kicks in and you spin rings to angle weapons at incoming Protonovus creatures while watching the health bars drain. Cannons are reliable all-rounders, missiles hit harder with worse accuracy, gatling turrets spray suppressive fire, and lasers track enemies automatically within range. Merging weapon slots can create upgraded combined emplacements. On paper, that gives you meaningful build decisions. In practice, stacking merged missile launchers in a rough 360-degree spread breaks most encounters before they develop any tension. Critics noted you can practically step away from the controller during a mid-game assault and come back to a city still standing. That is not a difficulty-curve design, that is an absence of one. The PC port arrived after the console versions and brought some of its own friction. Controller implementation was handled sloppily, the rotation controls can be fiddly when you need to switch between rings quickly without accidentally cycling to the wrong layer, and the visual fidelity was already being compared to a prior hardware generation on release. None of this is a dealbreaker if you are going in with low expectations, but it does mean the PC version is not a cleaned-up upgrade over the PlayStation release. Cloud saves and controller support are present, which helps. Where the game genuinely loses people is the anime visual-novel wrapper around every mission. The cast is a collection of loud archetypes, the dialogue goes long, and the voice-acting is used sparingly enough that you will read far more than you hear. Skipping through cutscenes becomes habitual. Underneath all that noise, there is a crew progression layer where team members earn experience and you praise standout performers after each battle to raise their morale and stats, which is a low-friction RPG touch that fits the bite-sized session structure better than the padding around it. Who should actually consider this? If you have exhausted Dungeon Defenders, Defense Grid, and Fieldrunners and want something with a mechanical wrinkle you have not seen, the rotating-ring system is genuinely distinct. It suits short sessions, and some players report settling into a low-stakes rhythm that works precisely because it does not demand much. If you want a challenge that scales, a deep weapon tree that rewards optimization across a campaign, or production values that hold up to modern comparisons, this will not satisfy. The upgrade research is shallower than it looks, the enemy variety runs thin by mid-campaign, and the story will not fill that gap. Call it a curio from 2016 that had one good idea and spent its budget on anime voice clips instead of building the strategy layer those rings deserved. Diego, Scout Team

Tags

singleplayerachievementscontroller-supportcloud-savestier:sub-5Tower DefenseRotational MechanicAnime JRPGCity ManagementKaijuWeapon MergingCrew ProgressionLow-Difficulty

System Requirements

Minimum

OS
Windows 7 / 8 / 8.1
Memory
1 GB RAM
DirectX
Version 11
Network
Broadband Internet connection
Storage
7 GB available space
Graphics
nVidia GeForce 7900 GT or better / AMD Radeon X1900 / nVidia GeForce GT 620 (Windows 8.1)
Processor
Intel Core2 Duo
Sound Card
Direct Sound
Additional Notes
Compatibility with Xbox 360 Controller

Recommended

OS
Windows 7 / 8 / 8.1
Memory
2 GB RAM
DirectX
Version 11
Network
Broadband Internet connection
Storage
7 GB available space
Graphics
nVidia GeForce 8800 GT or better / AMD Radeon HD3700 / nVidia GeForce GT 650 (Windows 8.1)
Processor
Intel Core i5 / i7
Sound Card
Direct Sound
Additional Notes
Compatibility with Xbox 360 Controller

Community Discussion

Be the first to comment on Aegis of Earth: Protonovus Assault.

Reviews & Ratings

No ratings available

Game Info

Developer
ACQUIRE Corp.
Publisher
Aksys Games
Release Date
Jul 18, 2016

Price Alert

Get notified when the price drops below your target!

Create Alert

Price History

2026-06-102.87(lowest)

More from ACQUIRE Corp.

Buy smarter: helpful guides

Frequently asked questions about Aegis of Earth: Protonovus Assault

How much does Aegis of Earth: Protonovus Assault cost?

Aegis of Earth: Protonovus Assault pricing changes often and varies by store, edition and region. The live price table on this page compares the cheapest in-stock key and store offers across 50+ verified shops, so you always see the current lowest price before you buy.

Where can I buy Aegis of Earth: Protonovus Assault cheapest?

Compare Aegis of Earth: Protonovus Assault prices across every verified store in the price table on this page. We list the cheapest in-stock key and store offers, updated regularly, so you always see the best current deal before you buy.

What platforms is Aegis of Earth: Protonovus Assault available on?

Aegis of Earth: Protonovus Assault is available on PC.

When was Aegis of Earth: Protonovus Assault released?

Aegis of Earth: Protonovus Assault was released on 18 July 2016.

Who developed Aegis of Earth: Protonovus Assault?

Aegis of Earth: Protonovus Assault was developed by ACQUIRE Corp. and published by Aksys Games.