Hero Mastery

Largo

Largo — a Strength hero usually played as Hard Support. Lean on Amphibian Rhapsody as your key button.

Mastery parameters

Your GPM, last hits and damage per game against other Largo players — average vs Top 20%.

Learning journey

1 Know the kit
2 Win the lane
3 Timing & rotations
4 Win the fights
5 Master

5 stages, each with one target from your own games and one short quiz. Make Largo your mastery hero to start — progress shows on Home and Arcana.

Phase by phase

Laning: pressure their carry, don't feed

You 50%Team 50%

Skills in lane — Pro cores max Frogstomp (W) first — 71% of 321 games since patch 7.41, then Croak of Genius (E). Some max Catchy Lick (Q) first instead (29%). First talent at level 11.
First ward + sentry — Early vision control lets your team gank safely — place at chokes and runes.

Skills 1–7

Starting items

Iron Branch30%
Gauntlets of Strength28%
Tango10%
Faerie Fire8%
Magic Stick7%
Quelling Blade3%

Pros buy this phase

Phase Boots99%
Arcane Boots1%

The Offlaner's job this phase

Your goal isn't perfect farm — it's making sure THEIR carry doesn't farm. Contest every last hit.
Secure range creeps with a spell if needed; XP matters more than gold for you.
If the 1v2 is rough, hug your tower and ask the soft support to help zone.

Counters & weaknesses

Tank (big HP & armor)

The items that shut Largo down, 0 heroes that trouble it, and your answer when you play it.

Members only

Why this way? How OpenAI Five learned

One hero, one role first
OpenAI's first bot played only Shadow Fiend, only mid, until it mastered it. Stay on Largo in one role before moving on.
Small, measurable rewards
OpenAI Five was rewarded for last hits and staying alive long before it understood winning. That's why each journey stage has one number to hit.
From yourself to the team
Its 'team spirit' rose over the game: early on, look after yourself; late, play for the team. Each phase's meter shows the split.
Use proven builds
OpenAI Five's builds were hand-written, not trial and error. Start from the pro build, then experiment.

Phase items: what pros buy on this hero (OpenDota). Parameters: percentiles of players on this hero (OpenDota). Item effects checked against Valve's own item data.