Your mission in this fun game is still the same, you have to put towers along the path to combat the balloons. If the balloons make it to the end of the path, lives are lost. Each tower has its own strengths and weaknesses and each tower can be also upgraded. BTD4 features improved graphics, loads of new and original tower types and tons of upgrades for each tower type. Heaps of tracks, save games, career mode, sandbox mode and apopalypse mode. Use YOUR MOUSE to control the game. Have fun!