Ultimately this will be down to what device(s) you have access to, but there are some notable differences between each version of the game, so for those of you with the luxury of choice, we’ll point out what each version has (or even doesn’t have). That way you’ll know if a particular strategy isn’t applicable to the version you have.
| **Feature** | **iPhone/iPod Touch** | **iPad** | **Steam** | **Android** |
|---|---|---|---|---|
| Field Guide | No | Yes | Yes | Yes |
| iPad Retina-Scale / HD Graphics | No | Yes | Yes | No |
| Extra Towers (Cannonball, Sonic Boom, Machinegun, Zap, Slow Link) | Coming in next update (version 1.5) | Yes | Yes | Yes |
| In App Purchases | Yes | Yes | No | Yes |
| Polymorph Tower Cost | 15000 | 15000 | 4800 | 10000 |
| Non-touchscreen controls / hotkeys | No | No | Yes | No |
| Free version | Yes | Yes | No | No |
| Director’s Commentary | No | Yes | Yes | No |
Android Version Exclusive!¶
Exclusive to the Android version (for the moment at least), is the option to buy the towers you normally unlock by earning completing levels and their respective stars. Below you’ll find how many coins are needed to unlock these towers sooner.
| **Tower Type** | **Star Cost** | **Coin Cost** |
|---|---|---|
| Oil Tower | 7 Stars | or 1200 Coins |
| Plasma Tower | 9 Stars | or 1500 Coins |
| Pyro Tower | 14 Stars | or 2000 Coins |
| Spark Tower | 20 Stars | or 2500 Coins |
| Railgun Tower | 25 Stars | or 3000 Coins |
| Mine Tower | 36 Stars | or 5000 Coins |
| Radiation Tower | 48 Stars | or 6000 Coins |
| Nuke Tower | 70 Stars | or 9000 Coins |
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