Insaniquarium (2001, PopCap) has no cheat codes, console commands, or hidden cheat menus. The game is designed around resource management, timing, and strategy. Cheating would break the delicate economy (fish prices, alien cycles, egg costs) that makes each run tense and rewarding.
PopCap designed Insaniquarium as a "casual hardcore" game—simple mechanics, deep optimization. The leaderboard (local) and personal bests are the reward. Adding cheats would trivialize the balancing act of fish economics vs. alien pressure.
Embrace the grind. That first King Guppy diamond drop feels earned because it is.