A “perfect game” is one where you've unlocked every achievement in its list. The profile counter — “Perfect Games: N” — is completionism's scoreboard, and chasing it collides with some of the strangest obstacles in gaming: dead multiplayer servers, missable story flags, and achievements that statistically nobody should have.
How perfection is counted
Steam tracks completion per game automatically; your profile can showcase the count and recent completions. One wrinkle trips people: the definition follows the *current* achievement list. When developers patch in new achievements years later, previously perfect games become imperfect again until you re-earn the gap.
What makes some perfect runs brutal
- Multiplayer ghosts — achievements requiring populated servers in games whose populations moved on years ago.
- Missables — story choices and one-chance moments demanding full replay planning.
- Grind ceilings — collectathons asking hundreds of hours for a single tally achievement.
- Luck walls — RNG drops with expected times measured in tens of hours.
- Delisted content — achievements tied to removed modes can become literally unobtainable.
Practical tips for completionists
- Check the achievement list *before* starting a story game — missables decide whether one run suffices.
- Favor games with sensible lists if you're hunting counts rather than experiences.
- Remember refunds pair beautifully with regretted purchases: under two hours played and fourteen days owned gets your money back.
- Track your overall library shape — hours, completion trends and neglected games — with a full profile lookup.
Frequently asked questions
Do DLC achievements affect a perfect game?
Only achievements in the base game's list count toward its perfection. Separate DLC lists, where they exist, track independently.
Can a game become imperfect without me doing anything?
Yes — developer updates that add achievements retroactively break existing perfect statuses until you earn the newcomers.
What's the rarest kind of perfect game?
Completions of games whose final achievements have sub-0.1% unlock rates — usually luck-grinds or multiplayer relics — are the crown jewels of showcase collections.
Put your own numbers on the board
Look up any public Steam profile for hours played, library value, inventory worth and a playtime heatmap — free, no sign-up.