SF Defense: Tower Defence TD

SF Defence is a sci-fi tower defense game in portrait mode. Place your guns, pick your cards, and hold the last line of a space station under siege.

You are the commander. Enemy waves, elites, bosses and meteors come at your base, and every stage asks the same question a different way: which turret, which card, which upgrade.

This is a single-player strategy tower defense game built to be played with one hand. Clear a stage in a few minutes, keep everything you unlocked, and carry it into the next fight.

[COMBAT]
· Auto-fire, piercing lasers, indirect-fire mortars and disruptor fields. Every weapon has a job, and every weapon has its own upgrade path.
· Pick your line of defence: rail, mortar, burst or field.
· Choose a battle card mid-fight to reshape your damage and your tactics on the spot.
· Elites, bosses and meteors. Even a familiar enemy fights differently each time it appears.
· Break the wave before it reaches the station. Lose the station and the stage is over.

[TOWERS AND WEAPONS]
· Rail guns, burst cannons, mortar towers and field generators, each with its own range, cooldown and role.
· Place every tower on the line of defence and decide what it should hit first.
· Improve a turret with cards and upgrades so the same gun carries you deeper into the run.
· Mix direct damage, splash damage and slow effects to survive a heavier wave.

[BATTLE CARDS]
· Every level-up deals you a hand of battle cards. Pick one, and the fight changes.
· Cards boost your main weapon and your towers mid-fight. More shots, more piercing, more range.
· A card battle layer sits on top of a classic tower defense core.

[ENEMIES AND BOSSES]
· Waves of alien fighters, armoured elites and heavy bosses push toward the station.
· Meteors fall mid-stage and force you to move your fire.
· No two waves line up the same way, so you keep re-reading the field.

[STAGES]
· Stage after stage, each one a short tower defense puzzle with its own pressure.
· First clear unlocks the next stage, and every clear feeds your research.
· Win, lose or leave early. The results screen shows what happened, and you can retry.

[RESEARCH]
· Build a research tree across your weapons and equipment.
· Every node you unlock changes how a fight plays, not just how big the numbers are.
· Upgrade a turret or unlock a new one, and the way you defend the base changes with it.

[COLLECTION]
· Every tower defense run fills your bestiary with the enemies you meet.
· Gather characters and gear from the collection and the shop.
· See what you have unlocked and what is still missing.

[PATROL]
· Send a patrol out and keep fighting other stages while it runs.
· Come back for the daily reward.

[ACCOUNT]
· Progress is saved on the server.
· Link a Google account to continue on another device.

[HOW IT PLAYS]
· A tower defence game you can hold in one hand, in portrait.
· Short stages: a fight is minutes, not hours.
· Permanent upgrades, so a hard stage still moves you forward.
· The same stage does not play the same way twice, because elites, bosses and meteors keep it moving.

[TIPS FOR A STRONGER RUN]
· Watch the squad bar and pull your guns back before the line breaks.
· Save your best cards for the elite and boss waves.
· Upgrade the weapon you already use before unlocking the next one.

[WHY IT FEELS DIFFERENT]
· A defense game where the decisions happen during the fight, not only before it.
· Fast, readable battles made for short daily sessions.
· One-handed portrait play, from the first wave to the boss.

[LANGUAGES]
· Korean, English, Japanese, Simplified Chinese, Traditional Chinese, Spanish, German, French and Portuguese.

※ Contains in-app purchases (in-app items, Premium Pass, diamonds, gacha) and ad-rewarded features. The type and odds of randomized items are disclosed in an in-game information screen.
※ Purchases and subscriptions are processed through Google Play.

Recent changes:
Enemies move with more life, and hits and kills read better. Main-weapon volleys now fire shot by shot, turret blasts and lightning keep their colour as they fade, and the stage clear has a new call.