Rocket Fortress is a clicker RPG and defense shooter rolled into one. You command a fortress armed with holy missiles and hold off endless waves of demons, zombies, and mutants, with the real objective hiding behind them: destroy the portals they spawn from before they overwhelm your walls.
The controls are built for a single pointer. Left click or tap to fire missiles, and the spacebar also fires — hold it for continuous volleys when your clicking finger needs a rest. The mouse handles menus and upgrades, and touch controls cover mobile, so the whole game runs on one input.
The upgrade loop is the backbone. Every kill and portal pays coins, diamonds, and minerals, which feed missile damage, launcher power, and firing speed first, then recruited marines and automated units that auto-fire without input. From there you chase advanced missile types and special powers.
The special powers are the burst tools — Laser Lock, Stimpack, the Big Beautiful Missile, Massive Bombard, and the Mineral Mine — and they are saved for the rough moments, especially the bosses that show up roughly every ten portals. Crates, Leeches, the Box Fairy, and Dungeon battles all feed extra resources back into the machine.
Being honest about its scope: this is a single-player clicker defense game, not a multiplayer battler. The depth is in target priority, upgrade order, and timing your power-ups — which is plenty to carry the loop.