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Survival one-off weapon handouts

This page expands the survival_update (0x00407cd0) handout logic that grants two non-quest weapons in Survival and is therefore a concrete lead for secret weapon behavior.

Why this matters for secrets

  • The handout code directly assigns:
  • weapon id 24 (0x18) — Shrinkifier 5k
  • weapon id 25 (0x19) — Blade Gun
  • Both weapons are absent from quest_unlock_weapon_id in quest_database_init; see weapon candidates.
  • The startup secret-hint block says there are "few secret weapons hidden inside the game"; these handouts are two verified runtime paths that fit that hint.

Handout A: time-based Shrinkifier 5k

survival_update runs the check when all of these are true:

  • single-player (config_player_count == 1)
  • survival_reward_damage_seen == 0
  • survival_reward_fire_seen == 0
  • run_elapsed_ms > 64000
  • survival_shrinkifier_handout_enabled != 0

Side effects:

  • only if the current weapon is Pistol (player_state_table[0].weapon_id == 1):
  • weapon_assign_player(0, 24)
  • survival_reward_weapon_guard_id = 24
  • always:
  • survival_shrinkifier_handout_enabled = 0
  • survival_reward_damage_seen = 1
  • survival_reward_fire_seen = 1

The flag writes sit outside the Pistol test, so reaching 64 seconds while holding another weapon consumes the chance without a grant.

Handout B: low-health centroid Blade Gun

survival_update grants id 25 if all of these are true:

  • single-player (config_player_count == 1)
  • survival_first_kill_count == 3
  • survival_reward_fire_seen == 0
  • player distance to centroid of first 3 recorded death positions is < 16.0
  • player_health < 15.0
  • this check does not require survival_shrinkifier_handout_enabled != 0 and does not test survival_reward_damage_seen

Centroid formula:

  • cx = (p0.x + p1.x + p2.x) * 0.33333334
  • cy = (p0.y + p1.y + p2.y) * 0.33333334

Side effects:

  • weapon_assign_player(0, 25)
  • survival_reward_weapon_guard_id = 25
  • survival_reward_fire_seen = 1
  • survival_shrinkifier_handout_enabled = 0

Decoded Blade-hint mapping (inference)

From the decoded secret line in Easter eggs:

Dead Center Inside The Triangle Of The First Blood Sacrifice Yourself For Firepower

The Blade Gun handout gate matches this text closely:

  • "Dead Center Inside The Triangle" -> player must stand near the centroid of three recorded death positions (distance < 16.0).
  • "Of The First Blood" -> the check uses the first three stored death samples (survival_first_kill_count == 3, positions at indices 0..2).
  • "Sacrifice Yourself" -> player health must be low (player_health < 15.0).
  • "For Firepower" -> reward is weapon id 25 (Blade Gun).

This mapping is an evidence-backed inference, not a direct static code xref from the secret string to survival_update.

Gate writers and lifecycle

Related writes outside survival_update:

  • player_update sets survival_reward_fire_seen = 1 only after held fire or auto-fire passes the normal or reload-perk shot-readiness gate. Holding fire during cooldown does not set it.
  • player_take_damage sets survival_reward_damage_seen = 1 on damage attempts (including shielded hits).
  • creature_handle_death records up to 3 death positions and increments survival_first_kill_count up to 6.
  • When survival_first_kill_count reaches 3, creature_handle_death sets:
  • survival_reward_fire_seen = 0
  • survival_shrinkifier_handout_enabled = 0 This is the key transition that enables the second handout check.

Run reset state (gameplay_reset_state) initializes:

  • survival_reward_weapon_guard_id = 1
  • survival_first_kill_count = 0
  • survival_reward_damage_seen = 0
  • survival_reward_fire_seen = 0
  • survival_shrinkifier_handout_enabled = 1

Temporary weapon guard behavior

gameplay_render_world enforces that ids 24 and 25 are only valid when the guard id matches:

  • if player_weapon_id == 25 and survival_reward_weapon_guard_id != 25, force Pistol (weapon_assign_player(..., 1))
  • if player_weapon_id == 24 and survival_reward_weapon_guard_id != 24, force Pistol (weapon_assign_player(..., 1))

This makes the handouts effectively temporary, guard-bound rewards instead of normal unlocks.

Evidence pointers

  • Recovered sources under decomp/1.9/crimsonland/:
  • game/survival_update.cpp (0x00407cd0): both handout checks
  • game/gameplay_render_world.cpp (0x00405960): guard checks
  • gameplay/player_update_heading.cpp (player_update, 0x004136b0): fire flag write
  • crimsonland/player_take_damage.cpp (0x00425e50): damage flag write
  • crimsonland/creature_handle_death.cpp (0x0041e910): recent-death tracking
  • gameplay/gameplay_reset_state.cpp (0x00412dc0): run reset
  • docs/re/static/reference/weapon-id-map.md
  • docs/re/static/secrets/weapon-candidates.md
  • docs/crimsonland-exe/survival.md