mgs2_boss_olga [Metal Gear Speedrunners]

Olga is the first boss fight of the game. She can only be defeated non-lethally (M9 / Stun Grenades).

Olga will always spawn on the top-right corner of the map. From there, she will either go left or right. Where she goes is entirely random and will determine the pace of the fight.
[Very Easy / Easy] Olga has a bleeding mechanic where she'll lose stamina after being shot once. She loses 4 stamina-points every 2 seconds until she reaches 64 SP.
[Very Easy / Easy / Normal / Hard] At the start of the fight, Olga can targeted onto for a 3rd-person body shot.
A headshot on Olga is always a guarenteed 25% of her health taken down.
Olga's “Conflict and Victory” cutscene is ~7 seconds long.

The following table lists Olga's stamina and how much damage she deals per difficulty:

Difficulty	Health	USP	Grenade
Very Easy	128	5	10
Easy	128	5	10
Normal	128	8	14
Hard	128	15	24
Extreme	128	30	50
European Extreme	128	30	50

The following table lists how much damage an M9 shot deals to Olga based on difficulty and where she was shot:

Difficulty	Head	Body	Limb
Very Easy	32	24	15?
Easy	32	20	11
Normal	32	20	11
Hard	32	20	11
Extreme	32	25	11
European Extreme	32	25	11

If Olga goes left, the usual best-case scenario is to have her loop.
The loop is when you continously shoot at her while she tries to reload prior to the “Conflict and Victory” mini-cutscene.
Olga needs to empty out her USP for her to loop.
Sometimes the loop can fail!

The following are how to deal with Olga if she goes left at the start, but does not loop.

Time: ~ seconds

Only possible on lower difficulties as it requires an early third-person shot using the autoaim.
Delay this first shot slightly as the fight fades in to land the shot.
The second shot can be done in third-person too using the autoaim.
After the cutscene, shots no.3 and 4 are similar to a standard right-side Olga.

Time: ~19 seconds

Only possible on lower difficulties as it requires an early third-person shot using the autoaim.
Delay this first shot slightly as the fight fades in to land the shot.
Seems to be very dependent on RNG or incredibly precise.

Time: ~14 seconds

Only possible on lower difficulties as it requires an early third-person shot using the autoaim.
Delay this first shot slightly as the fight fades in to land the shot.
Seems to be very dependent on RNG or incredibly precise.
Intentionally fail the cutscene buffer, as this forces to move forward and removes her invincibility frames for the final shot.

If Olga goes right, you want to land 2 shots on her before she begins the conflict and victory cutscene.
After the cutscene, Olga will run towards to the small box close to Snake. This is the best chance to land the 3rd shot.
After this, Olga can move either forward/backward. Wait for her to stop moving then land the 4th and final shot.

Credit: Tino for finding out the third shot was possible and PlatonicGuy for finding out how to land the final fourth shot.

If Olga goes right, you want to land all four shots before she begins the conflict and victory cutscene.
On Very Easy and Easy, only the final three shots must be headshots. The first may be a body shot.
On Normal, Hard, Extreme, and European Extreme, all four shots must be headshots.
The third and fourth are very precise and will fail the vast majority of times.
Pause-buffering might help especially with the final shot.
If the third or fourth shots fail to land , the remainder of the fight behaves like a regular Right-Side (No Loop) fight.

Note: The third shot is possible on a Left-Side (No Loop, Early Shot) fight, however no one has yet figured out how to do the fourth shot.

A right-side loop is something that never happens unless you're specifically aiming for it.
Olga needs to spawn on the right and empty out her gun before she attempts to trigger the “Conflict and Victory” cutscene.
The first method is to crouch next to the hole facing north, but getting up before Olga plays a mini-cutscene. In some occasions, this causes Olga to sit next to the box and start firing at Snake.
The second method is believed to be played on PAL 50Hz. At this frame-rate, Olga will sometimes go to the box herself on a right-side spawn and starting firing at Snake.

By triggering the cutscene of the piece of cloth on the tarp flying shortly before Olga begins her “Conflict and Victory” cutscene, you can regain control of Snake while she's having her monologue.
Before Olga ends her “Conflict and Victory” cutscene, prepare to get an instant headshot as soon as the cutscene is over.
At this point, Olga will either stay in her place (ideal scenario) or walk slowly towards to the box.