| Level 1 | Thriving Requirement 1: at least 6 objects or plants with the Trees tag | |
| Level 2 | Thriving Requirement 2: Scratching Post, at least 2; Sumatran Tiger Fact Sheet | |
| Level 3 | Release groups and release to the wild | |
| Level 4 | Thriving Requirement 3: Food Grade 2; Fertility Level 1 (+15% fertility) | Before this level: an Observation Network (Observation Platform) in Sumatra Reserve and this species released in Sumatra Reserve |
| Level 5 | Thriving Requirement 4: at least 50% native plants | |
| Level 6 | Thriving Requirement 5: Deep Water Surface Area; Fertility Level 2 (+30% fertility) | |
