Every SteamWorld game released after 2013 has a reputation for being welcoming. Dig is gentle. Dig 2 is generous. Build is described in its own reviews as too easy.
The first game in the series is the opposite, and the studio said so itself.
See where Tower Defense ranks among the studio’s games, and the series order guide for what came before and after it.
Image & Form stated on their own channel that SteamWorld Tower Defense is the hardest game they have ever made — and that its lead developer is the only employee who finished it.
That is not a marketing claim about difficulty. It is a studio admitting its own staff could not complete their product.
What it actually is
Released 5 July 2010 on Nintendo DSiWare for 500 Points, Tower Defense is a straight, traditional tower defence game. You play the robot sheriff of Cowbot City, defending gold mines from human raiders across fourteen levels.
The loss condition is specific and unforgiving: five humans reaching the end of the path ends the level. Not a health bar, not a base with hit points — five leaks. The level select screen tracks exactly how many you let through, and zero is achievable on every map if you solve it.
The five towers, and why there is no best one
| Tower | What it does | Why it exists |
|---|---|---|
| Gunslinger | Cheap, weak basic tower | Your default and your filler. Never your answer |
| Repeater | Many weak shots, high health, more expensive | Volume — against fast, low-health enemies |
| Bomber | Area damage — but it hurts your own units too, and self-heals | Crowds. Also the tower most likely to kill your own line |
| Sharpshooter | Extremely high damage, fires only where you tap, then cooldowns | The big single target. Requires your attention, not your money |
| Bartender | Very high health, zero damage, slows enemies | Time. It converts a fast wave into a slow one so everything else can work |
Read that as a puzzle set rather than a power ladder. Each tower answers one enemy and is bad against another, which is why “what is the best tower” is the wrong question and why the game is hard.
The six enemies, and which tower each one punishes
| Enemy | Behaviour | Punishes |
|---|---|---|
| Hobos | Basic, weak | Nothing. They are the tutorial |
| Explosive Hobos | Explode on death, damaging units around them | Melee-range clustering — your Gunslinger wall |
| Mavericks | Shoot back as they walk | Undefended stretches of path |
| Crazy Mavericks | High health and damage; stop walking to fire until the unit dies | Static defence. They out-range and out-damage a single tower |
| Cow Riders | Very fast | Slow-firing towers. This is what Sharpshooters and Bartenders are for |
| Walking Nuke | Very slow, explodes like an Explosive Hobo with massively more damage over a much wider radius | Everything you have built close together |
The pattern: Explosive Hobos and Walking Nukes punish density, Cow Riders punish slow firing, Crazy Mavericks punish towers that cannot be sacrificed. Every level is a re-mix of those four pressures, which is why the game reads as a series of puzzles and why players describe replaying one map until the solution clicks rather than grinding for a better build.
Upgrades are a number, not a look
Every unit can be upgraded for damage and health, and enemies come upgraded in the same way. The only visual indicator is a small number under each unit.
That is a real usability problem in a game this hard: you cannot tell at a glance whether the tower holding the line is tier one or tier four. If a lane that used to hold suddenly collapses, check the numbers before you assume you misplayed.
Why it matters to the rest of the series
Tower Defense is set before Dig and Heist — the earliest point in the SteamWorld timeline — and it is where the whole aesthetic starts: rusty browns and yellows, brass, wild west robots, humans as the enemy.
It is also the experiment that taught the studio what not to do. Every later entry is easier, more generous and more forgiving, and reviews of those games say so repeatedly. The most plausible reading of the franchise’s design history is that Image & Form over-corrected after their own staff could not finish their first game.
Reception was mixed but respectable: Metacritic 71, with IGN at 8/10, Nintendo World Report at 7/10, Nintendo Life at 6/10 and eShopper at 58%. The recurring criticism was not quality — it was the difficulty spike arriving within minutes.
How to play it today
This is the practical problem. Tower Defense was DSiWare only, the DSi Shop closed in 2017, and the game is not in the SteamWorld Essentials Collection — that compilation deliberately excludes it. There has never been a port to Switch, PC or anything else.
So the options are:
- An original DSi with the game already installed.
- A 3DS that still carries the DSiWare download.
- Nothing else. There is no legitimate modern release.
If you are working through the series and this is the one gap, that is the reason.
How to actually beat a level
Because the game gives you almost no slack:
- Walk the path before you spend. Count the lane count and the chokepoints. Multiple paths with a limited budget is the stated core difficulty.
- Buy one Bartender early on the longest lane. Slowing converts the whole wave’s timing and makes every other tower more efficient.
- Keep Bombers away from your own line. They damage your units, and in a five-leak game you cannot afford self-inflicted losses.
- Hold the Sharpshooter in reserve for Cow Riders and Crazy Mavericks. It needs your taps, so it cannot be your background defence.
- Spread, do not stack, anywhere a Walking Nuke can reach. One wide blast on a tight cluster ends the map.
- Accept the replay. The levels are short by design so that repeated attempts feel like progress rather than a grind.
Related guides
- SteamWorld games ranked — where the unrated first game sits
- Series order guide — release order and the timeline
- SteamWorld Dig guide — the game that made the series famous
- SteamWorld Heist guide — the tactics entry
- Beginner guide — where to start if not here
- SteamWorld Headhunter — the game that never shipped