Really chilled tower defense game and series, can't believe I've only just discovered it. The gameplay loop is fun and the game seems really polished with good artwork and style. Highly recommend it.

Very Similar to the first game with only a few minor tweaks. Exactly what a sequel should be. The steam version has no pay to play features, all heroes are available with level progression.

初代、前线和起源应该是Kingdom Rush中经典作品了。但是在游戏设计上初代和起源都各有缺陷，初代英雄需要升级，起源平衡性就是一坨。所以我觉得前线是KR这款游戏中最经典、可玩性最高的版本了。塔防史上的又一个里程碑。
There are three most classic version of Kingdom Rash including First Version, Frontiers and Origins. But the game design of First Version and Origins have different disadvantages. The hero in the First Version need to be upgraded (bad design) and the balance of tower in Origins is a piece of ♥♥♥♥ (u just need to build blue tower and green tower then u win). In summary, I think Frontiers is the most classic and the most playable version of Kingdom Rush. It is another milestone in the history of Tower-Defense games.