Specific answers for common 99 Nights in the Forest roadblocks.
There is no official in-game tier list for 99 Nights in the Forest. Community guides disagree: one ranks Mammoth, Deer, Trader, Grenadier, and Gunslinger as S-Tier, while another ranks Big Game Hunter, Cyborg, Necromancer, and Vampire as S-Tier. Pick based on your playstyle and the current update.
99 Nights in the Forest runs on Roblox, so most not working problems are Roblox client or device issues. Lower Graphics Quality, use a wired connection, close background apps, clear the Roblox cache, and update your GPU drivers.
The Cultist Stronghold is the only repeatable diamond source (5+ per clear, about 20-minute reset, about 15 per hour). Badges pay roughly 100-208 diamonds once; survival milestones pay 2 at Day 50 and 3 at Day 99; active codes add more.
Check when the 99 Nights Update Party is expected, how to join it from the main experience, and what to try if the party is missing or not loading.