Related Clues:

• Crucial
• Critical
• All-out
• Desperate
• Requiring heroics
• Eleventh-hour
• Indomitable
• Like a Hail Mary pass
• Desperate, as a situation
• Go for broke
• Doggedly determined
• Like a desperate effort
• Determined to succeed at all costs
• Recklessly determined
• 'Ours not to reason why, ours but to . . . . . . .''