The Island Raiders 20 train can be upgraded to level 6. According to relevant information, in the game of Island Raiders, the flame chariot can be upgraded to level 6 at the highest level, with 20 resources with 40,000 experience values, while the upgrade of the highest level of the train needs 30,000 experience values, so it can be upgraded to level 6. Raiders of the Island is a strategic tower defense type game, and players need to build buildings to protect their bases.