SKYSCRAPER-03: This phase III trial is comparing the safety and effectiveness of different targeted therapies for the treatment of locally advanced non-small cell lung cancerA Phase III, Open-Label, Randomized Study of Atezolizumab and Tiragolumab Compared With Durvalumab in Patients With Locally Advanced, Unresectable Stage III Non-Small Cell Lung Cancer Who Have Not Progressed After Concurrent Platinum-Based Chemoradiation

Exclusion

• Any history of prior NSCLC and/or any history of prior treatment for NSCLC (participants must be newly diagnosed with unresectable Stage III disease)
• NSCLC known to have a mutation in the epidermal growth factor receptor (EGFR) gene or an anaplastic lymphoma kinase (ALK) fusion oncogene
• Any evidence of Stage IV disease
• Treatment with sequential CRT for locally advanced NSCLC
• Participants with locally advanced NSCLC who have progressed during or after the definitive cCRT prior to randomization
• Any Grade >2 unresolved toxicity from previous CRT
• Grade >= 2 pneumonitis from prior CRT
• Active or history of autoimmune disease or immune deficiency
• History of idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced pneumonitis, or idiopathic pneumonitis or evidence of active pneumonitis
• History of malignancy other than NSCLC within 5 years prior to screening with the exception of malignancies with a negligible risk of metastasis or death
• Prior allogeneic stem cell or solid organ transplantation
• Active Epstein-Barr virus (EBV) infection or known or suspected chronic active EBV infection at screening
• Treatment with investigational therapy within 28 days prior to initiation of study treatment
• Prior treatment with CD137 agonists or immune checkpoint blockade therapies, including anti-cytotoxic T lymphocyte-associated protein 4, anti-T-cell immunoreceptor with Ig and ITIM domains (anti-TIGIT), anti-PD-1 and anti-PD-L1
• Any prior Grade >/= 3 immune-mediated adverse event or any unresolved Grade > 1 immune-mediated adverse event while receiving any previous immunotherapy agent other than immune checkpoint blockade agents
• Treatment with systemic immunosuppressive medication
• Women who are pregnant, or breastfeeding