Dimitri Rascalov is one of the primary antagonists in Grand Theft Auto IV, a treacherous and manipulative Russian mobster who betrays Niko early in the game. His 'boss fight' isn't a single encounter but a series of escalating confrontations culminating in a final, pivotal mission.

Key Missions Involving Dimitri:
- 'Russian Revolution': Dimitri betrays Niko and Roman, leading to a massive shootout.
- 'A Dish Served Cold': Niko confronts Dimitri on a cargo ship.
- 'A Revenger's Tragedy' / 'Out of Commission': The final confrontation, depending on your choice.
Strategy & Weaknesses:
Dimitri himself is rarely a direct combatant. Instead, his 'challenge' comes from the overwhelming number of armed thugs he commands and the treacherous situations he orchestrates. His primary weakness is his reliance on others and his tendency to flee when directly confronted.
- Crowd Control: Missions involving Dimitri often feature large groups of enemies. Use SMGs, Assault Rifles, and explosives (grenades, Molotovs) to clear out his henchmen.
- Cover System: Always utilize cover. Dimitri's forces are numerous and well-armed.
- Vehicle Combat: Some encounters involve car chases. Use drive-by shooting effectively or ram his vehicles.
- Patience: Don't rush into open areas. Pick off enemies methodically.
The final confrontation with Dimitri is a high-stakes chase and shootout. Ensure you have full health, armor, and plenty of ammo for your best assault rifle and a powerful shotgun. Focus on eliminating his bodyguards first, then pursue Dimitri relentlessly.