First of all, if you like the battle of the mecha in Heavy Soldiers, then the series of Iron Ambition may interest you. This series of games takes the mecha as the core, and players can customize the mecha to fight. These games usually have rich storylines and strategic combat systems, which allow you to enjoy a profound role-playing experience.
Another game worth mentioning is the final fantasy series. Each game in this series has a unique storyline and impressive characters. The combat system is also excellent, combining turn-based and real-time elements. You can explore the vast world, fight all kinds of enemies in it, and gradually improve your role strength.
If you are interested in science fiction, you can try the radiation series. This series of games took place in the post-nuclear war era. Players need to survive in the barren wasteland and fight all kinds of enemies. There are rich tasks and plots in the game, which make you feel the real post-apocalyptic atmosphere.
Finally, I recommend a classic RPG game, Wizard 3: wild hunt. Based on the novel series of Polish writer Andrei Sipkov, this game tells the adventure story of the protagonist Geralt. The world of games is huge, full of all kinds of tasks, copies and roles. The combat system is in-depth and interesting, and the plot is exciting.
In a word, if you like RPG games like "Heavy Soldiers", the above recommended games can bring you a similar game experience. I hope you can find your favorite game and have fun in it!