Free · 3D tower defense · 5 levels
Space Tower Defense: energy, grid squares and a base to keep alive
Space Tower Defense is a 3D tower defense game by BD Games in which you protect a futuristic base from waves of enemy vehicles by building towers on grid squares beside their route. Every tower costs energy, and each level hands you a fixed amount to spend — 15 or 20 at the start of the levels we played. You decide when the next wave comes by pressing START WAVE, and each enemy that reaches the base knocks points off your health, which starts at 10. Level 4, the one we played, holds 10 waves. The game has five levels with short briefs such as "Take advantage of choke points" and "Guard both paths from enemies", each rated with up to three stars. GamePix notes that another game with the same title, a 2D medieval castle defense, is unrelated.
Quick facts
- Developer: BD Games
- Genre: 3D tower defense on grid squares
- Levels: 5, each rated with up to 3 stars
- Waves per level: 10 (as shown on level 4)
- Tower menu: 4 to 5 tower types priced in energy
- Mouse to build; arrow keys move the camera
How to play Space Tower Defense
Each level starts paused, so you can place towers before the first enemy appears.
- 1
Choose a level
Press LEVEL SELECT and swipe through the cards. Each card names the level, gives a one-line brief and shows its three stars.
- 2
Place your first towers
Click a tower icon in the lower-right bar, then click a free square with a green outline. A shaded circle shows the tower's range before you commit.
- 3
Start the wave
Press START WAVE at the top of the screen. The bar there becomes a wave counter, such as WAVE 1/10, with a progress line.
- 4
Upgrade, sell and repeat
Click a built tower to see its stats, an UPGRADE button with its energy cost, and a SELL button that refunds part of the price.
Controls
Desktop
- Left-click a hexagonal tower icon to pick a tower type
- Left-click a green grid square to build the chosen tower
- Arrow keys pan the camera around the map
- Click an existing tower for Upgrade and Sell
Phone & tablet
- GamePix lists the game for mobile browsers as well as desktop
- The layout is landscape; turn the phone sideways
- An Android version exists, according to GamePix
What sets Space Tower Defense apart
Every tower is priced in energy
Towers cost 4, 6, 12, 15 or 20 energy depending on type, and any tower you cannot afford shows its price in red.
Stats on every tower
The first tower, the Assault Cannon, reads 1.00 DPS with the note "Tier 1 - High fire rate, low damage". Its first upgrade costs 8 energy and adds fire rate; selling it returns 2.
Levels built around one idea
Level briefs include creating mazes to slow enemies, using choke points, protecting a long mountain pass and guarding two paths at once.
Three stars per level
Each level card holds three stars, and a failed level shows the same empty row next to Main Menu and Restart.
Tips for Space Tower Defense
- Build on bends and junctions. GamePix points out that towers placed there hit enemies more times as they pass.
- Count before you upgrade. The game's own advice is to put down more towers first and upgrade later.
- Spend before the first wave. Energy does nothing while it sits in the counter at the top left.
- Mix tower types. A spread of towers covers more of the route than one type repeated.
- Sell to reposition. The Sell button refunds some energy, which you can spend on a better-placed tower.
Who is Space Tower Defense for?
Tower-defense players
Grid placement, wave control and upgrade tiers follow the classic formula in a sci-fi setting.
Players who want a short game
Five levels make it something you can finish rather than an endless grind.
Planners
Waves wait for your START WAVE button, so the build phase has no time pressure.
Health, waves and stars
Your base health, shown by the red icon at the top left, starts at 10. Enemies that reach the highlighted base area remove health, and at zero the screen reads "LEVEL 4 FAILED!" (or the level you were on) with Main Menu and Restart. GamePix describes the goal as keeping the base safe until your towers have destroyed every wave; the level cards show up to three stars for each level. Energy, the blue number under health, pays for every tower and upgrade.
Frequently asked questions
What is Space Tower Defense?+
Space Tower Defense is a 3D tower defense game by BD Games. You build towers on grid squares to stop waves of enemy vehicles from reaching your base across five levels.
How do you build and upgrade towers in Space Tower Defense?+
Click a tower icon, then a green grid square. Click a built tower to upgrade it for energy or sell it for a partial refund; GamePix says each tower can be upgraded twice.
How many waves are in a Space Tower Defense level?+
Level 4 has 10 waves, shown as WAVE 1/10 at the top of the screen. Waves start only when you press START WAVE.
What happens when enemies reach your base in Space Tower Defense?+
Each one lowers your base health, which starts at 10. When it reaches zero the level fails and you can restart it.
Is Space Tower Defense the same as the medieval Space Tower Defense?+
No. GamePix notes a different game with the same name that is a 2D castle defense against aliens. This one is a 3D sci-fi game by BD Games.
Privacy
The game you see here is run by GamePix and placed on this page in an embedded frame. GamePix, not What Games Play, is in charge of the ads shown in it. Play starts without any account.
Ten health points to protect
Pick a level, spend your energy on towers and press START WAVE.
↑ Play Space Tower Defense
