If you bought a physical copy of Tropix 2 back in the day, check the back of the CD jewel case or the back of the instruction manual. In the mid-2000s, this was the standard place for publishers to print activation keys.
Q: What if I lose my Tropix 2 Activation Code? A: Contact the game's support team or the retailer for assistance. Tropix 2 Activation Code
That said, here are your realistic options: If you bought a physical copy of Tropix
For pure match-3 nostalgia, (free on Steam) or the original Bejeweled 3 (still sold on Steam) are excellent substitutes. you could try:
If you already purchased the game but lost your code, you could try: