

Red Siren: Space Defense
ISTOM Games · December 4, 2025 · Action, Casual, Robots, Shooter, Action-Adventure
Buy the Red Siren: Space Defense key for Steam from Kinguin at $1.17 — the cheapest of 2 stores we compare.
Where to buy Red Siren: Space Defense — official stores
Cheapest Red Siren: Space Defense keys — keyshops
Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.
Red Siren: Space Defense price by region
Red Siren: Space Defense costs £0.43 in the United Kingdom, €0.49 in Europe (EUR), $1.17 in the United States, $1.17 in Georgia (USD), zł2.74 in Poland, CA$19.49 in Canada, A$21.95 in Australia, NZ$21.99 in New Zealand and R$46.99 in Brazil right now.
| Region | Best price | Official store | Key shop | Stores |
|---|---|---|---|---|
| £0.43 −97% | £12.79 | £0.43 | 2 | |
| €0.49 −97% | €14.79 | €0.49 | 2 | |
| $1.17 −92% | $14.99 | $1.17 | 2 | |
| $1.17 −72% | $4.24 | $1.17 | 2 | |
| zł2.74 −96% | zł67.99 | zł2.74 | 2 | |
| CA$19.49 | CA$19.49 | — | 1 | |
| A$21.95 | A$21.95 | — | 1 | |
| NZ$21.99 | NZ$21.99 | — | 1 | |
| R$46.99 | R$46.99 | — | 1 |
Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.
Screenshots
About Red Siren: Space Defense
Red Siren is an intense sci-fi action shooter where you pilot the galaxy’s most advanced starfighter to defend planets against waves of robots, tanks, mechs and war machines. Upgrade your ship, unleash devastating weapons, and dominate epic battles across hostile alien worlds.
Red Siren: Space Defense — game info
- Platforms
- Windows
- Player modes
- Single-player
- Controller
- Full controller support
- PC Game Pass
- Not included
What Steam players say
Recent verbatim reviews from Steam — separate from playze.io community reviews below.
Red Siren: Space Defense is a twin-stick shooter with 45 stages that players praise for responsive controls, solid visuals, and satisfying effects, though it works better with mouse and keyboard despite controller support. Common complaints center on repetitive mission design, confusing UI that makes weapon upgrades unclear, enemies frequently escaping off-screen, and a progression system that feels grindy. Players seem interested in the core gameplay but frustrated by presentation issues and lack of tactical variety.
The game focuses entirely on gameplay and comes without any real baggage in terms of story or justification for blasting through waves of enemies. Your goal is to move through a series of stages and destroy tanks, jets, and other hostile units before they destroy you or your headquarters. The path to the final stage is mostly linear, though there are a few side missions where you must carefully maneuver your ship through minefields, collect supply crates, or protect a supply ship. In total, there are 45 stages. The mechanics are based on the twin stick shooter formula, which means you move with one control stick while firing with the other. You can also play with a keyboard and mouse, which may even be the recommended option due to the increased precision it provides. In addition to your main gun, you have access to special weapons, bombs, and missiles. Unlike the primary weapon, which has unlimited ammunition and no restrictions, these secondary weapons require a cooldown period before they can be used again. Beyond the main objective of destroying all enemies, each mission includes two bonus objectives that are always the same. These include completing the mission within a set …1 found this helpful
Progression system makes you to grind. Enemies fly out of your screen half of the time wth
This game plays nicely, and there are certain aspects of it that I like: visuals, effects, controls (even though it claims to be a game designed for controllers, it can be played via mouse and keyboard well enough). There are some areas the devs should work on: - General monotony of missions and enemies, staleness of tactics (fly fast, hit and run); - Confusing UI (haven't figured how to buy or equip secondary weapons, missiles or bombs); - Chaotic movement of aerial enemies (fly off above the top of the screen).
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