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Get a player's achievements

get_player_achievements

Read-only

Retrieve a player's achievement progress for a game, including unlocked count, completion percentage, and per-achievement unlock dates, using SteamID64 and appid.

Instructions

Get a player's achievement progress for one game (unlocked count, % complete, per-achievement unlock dates) by SteamID64 + appid — unlocked/completion_pct always reflect the full list, but the per-achievement achievements array is capped at 200, unlocked first (check returned vs total — most games have far fewer). For the game's full achievement list (names, descriptions, global rarity) independent of any player, use get_game_achievements instead; for just the rarity without a key, use get_global_achievements. Requires STEAM_API_KEY and a public profile with game-details visibility — otherwise it returns found:false (also returned if the game has no achievements at all).

Input Schema

TableJSON Schema

Name	Required	Description
`appid`	Yes	Steam application id (appid). Get it from search_games.
`steamid`	No	17-digit SteamID64. Omit to use the STEAM_ID configured on the server. Convert a vanity/custom URL name with resolve_vanity_url first.
`language`	No	Language for achievement names/descriptions; overrides STEAM_LANGUAGE.

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.13.1Aug 17, 2026

changedOutput schema / oneOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "found": {
-        "const": false,
-        "type": "boolean"
-      },
-      "reason": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "found",
-      "reason"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "achievements": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "achieved": {
-              "type": "boolean"
-            },
-            "name": {
-              "type": "string"
-            },
-            "unlocked_at": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "required": [
-            "achieved",
-            "unlocked_at"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "completion_pct": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "found": {
-        "const": true,
-        "type": "boolean"
-      },
-      "game": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "returned": {
-        "type": "number"
-      },
-      "total": {
-        "type": "number"
-      },
-      "unlocked": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "found",
-      "game",
-      "total",
-      "unlocked",
-      "completion_pct",
-      "returned",
-      "achievements"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "found": {
+        "const": false,
+        "type": "boolean"
+      },
+      "reason": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "found",
+      "reason"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "achievements": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "achieved": {
+              "type": "boolean"
+            },
+            "name": {
+              "description": "Display name, falling back to the achievement's internal api name when Valve's schema has no localized title for it.",
+              "type": "string"
+            },
+            "unlocked_at": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "required": [
+            "achieved",
+            "unlocked_at"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "completion_pct": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "found": {
+        "const": true,
+        "type": "boolean"
+      },
+      "game": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "The game's name from Valve's achievement schema — occasionally an internal dev codename rather than the store title (e.g. 'Fiber' for Persona 5 Royal). Treat the appid you passed as the reliable identifier, or get the store title from get_game."
+      },
+      "returned": {
+        "type": "number"
+      },
+      "total": {
+        "type": "number"
+      },
+      "unlocked": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "found",
+      "game",
+      "total",
+      "unlocked",
+      "completion_pct",
+      "returned",
+      "achievements"
+    ],
+    "type": "object"
+  }
+]

Changed3 schema fields changedv0.12.1Jul 30, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

removedOutput schema / anyOf

Removed value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "found": {
-        "const": false,
-        "type": "boolean"
-      },
-      "reason": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "found",
-      "reason"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "achievements": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "achieved": {
-              "type": "boolean"
-            },
-            "name": {
-              "type": "string"
-            },
-            "unlocked_at": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "required": [
-            "achieved",
-            "unlocked_at"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "completion_pct": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "found": {
-        "const": true,
-        "type": "boolean"
-      },
-      "game": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "returned": {
-        "type": "number"
-      },
-      "total": {
-        "type": "number"
-      },
-      "unlocked": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "found",
-      "game",
-      "total",
-      "unlocked",
-      "completion_pct",
-      "returned",
-      "achievements"
-    ],
-    "type": "object"
-  }
-]

addedOutput schema / oneOf

Added value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "found": {
+        "const": false,
+        "type": "boolean"
+      },
+      "reason": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "found",
+      "reason"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "achievements": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "achieved": {
+              "type": "boolean"
+            },
+            "name": {
+              "type": "string"
+            },
+            "unlocked_at": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "required": [
+            "achieved",
+            "unlocked_at"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "completion_pct": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "found": {
+        "const": true,
+        "type": "boolean"
+      },
+      "game": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "returned": {
+        "type": "number"
+      },
+      "total": {
+        "type": "number"
+      },
+      "unlocked": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "found",
+      "game",
+      "total",
+      "unlocked",
+      "completion_pct",
+      "returned",
+      "achievements"
+    ],
+    "type": "object"
+  }
+]

Changed1 schema field changedv0.10.4Jul 26, 2026

changedOutput schema / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "found": {
-        "const": false,
-        "type": "boolean"
-      },
-      "reason": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "found",
-      "reason"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "achievements": {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "achieved": {
-              "type": "boolean"
-            },
-            "name": {
-              "type": "string"
-            },
-            "unlocked_at": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "required": [
-            "achieved",
-            "unlocked_at"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "completion_pct": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "found": {
-        "const": true,
-        "type": "boolean"
-      },
-      "game": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "total": {
-        "type": "number"
-      },
-      "unlocked": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "found",
-      "game",
-      "total",
-      "unlocked",
-      "completion_pct",
-      "achievements"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "found": {
+        "const": false,
+        "type": "boolean"
+      },
+      "reason": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "found",
+      "reason"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "achievements": {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "achieved": {
+              "type": "boolean"
+            },
+            "name": {
+              "type": "string"
+            },
+            "unlocked_at": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "required": [
+            "achieved",
+            "unlocked_at"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "completion_pct": {
+        "anyOf": [
+          {
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "found": {
+        "const": true,
+        "type": "boolean"
+      },
+      "game": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "returned": {
+        "type": "number"
+      },
+      "total": {
+        "type": "number"
+      },
+      "unlocked": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "found",
+      "game",
+      "total",
+      "unlocked",
+      "completion_pct",
+      "returned",
+      "achievements"
+    ],
+    "type": "object"
+  }
+]

Addedv0.10.2Jul 22, 2026
Removedv0.8.0Jul 17, 2026

Changed3 schema fields changedv0.3.0Jun 30, 2026

addedInput schema / properties / language

Added value: +{
+  "description": "Language for achievement names/descriptions; overrides STEAM_LANGUAGE.",
+  "minLength": 2,
+  "type": "string"
+}

changedInput schema / properties / steamid / description

Previous value: -"17-digit SteamID64. Convert a vanity/custom URL name with resolve_vanity_url first."New value: +"17-digit SteamID64. Omit to use the STEAM_ID configured on the server. Convert a vanity/custom URL name with resolve_vanity_url first."

changedInput schema / required

Previous value: -[
-  "steamid",
-  "appid"
-]New value: +[
+  "appid"
+]

First observedv0.1.0Jun 29, 2026

TDQS

A4.8/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint and openWorldHint, but the description adds key behavioral details: the achievements array caps at 200, unlocked first, and to check returned vs total; returns found:false for private profiles or games with no achievements. These go beyond the annotations and are critical for interpreting results.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two dense sentences, packed with valuable information. It is front-loaded with the core purpose, then expands on limitations, alternatives, and prerequisites. While every clause earns its place, the density and multiple parentheticals make it slightly harder to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (capped array, alternative tools, auth requirements, error cases) and the presence of an output schema, the description covers all necessary context. It explains what data is returned, the cap behavior, and when found:false appears, making it sufficiently complete for an agent to use effectively.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so parameters are fully documented. The description adds context by highlighting the role of SteamID64 and appid, noting steamid is optional (falls back to configured STEAM_ID), and language overrides. This extra explanation is valuable but not strictly necessary given the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly specifies the tool's function: retrieving a player's achievement progress for a single game via SteamID64 and appid. It differentiates from siblings by naming get_game_achievements for the full list and get_global_achievements for rarity without a key.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly states when to use the tool (for player-specific progress) and when to use alternatives (get_game_achievements for full game list, get_global_achievements for rarity). It also includes prerequisites (STEAM_API_KEY, public profile visibility) and the found:false outcome, giving clear usage context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.