Is there a good Android strategy game that's actually engaging for the long term, not just a few weeks?

Evony is a mobile strategy title built around long-term empire management and persistent world conflict. Its primary strength for sustained engagement lies in its server-based, never-ending war between player alliances. Players cultivate a city, research technologies, and train vast armies, but the core long-term hook is the social and strategic depth of joining a major alliance. These groups vie for control of historical landmarks like the Pyramids or the Kremlin on a shared world map, requiring coordinated diplomacy, scheduled attacks, and resource sharing that creates a compelling, ongoing meta-game. The developer, TG Inc., supports this with regular server-wide events, new generals to collect, and balance patches, which reviews indicate help freshen the experience. However, this depth demands a significant time investment; the cycle of upgrading buildings and troops can feel repetitive between major conflicts, and progressing without active alliance participation is notably slower. Users report the social coordination and large-scale PvP battles provide a sense of ongoing purpose absent from more solitary strategy games, though the in-app purchase model for speeding up progression remains a constant presence for free players. For anyone seeking a strategy game where daily login decisions impact a months-long campaign, Evony's model is specifically crafted for that purpose.