VIVIA — Gameplay Systems

Survival Mechanics

Stats

Stat	Max	Decay Rate	Death At
Health	30 (+4/vitality)	starvation 2.5/s, dehydration 2.8/s	0
Hunger	100	100/240s (~4 min)	starvation damage
Thirst	100	100/300s (~5 min)	dehydration damage
Warmth	100	climate-dependent	0 = freeze death

Regeneration

Requires 70%+ hunger AND 70%+ thirst — well-fed and hydrated. Below 15% of either: no regen, slow attrition (0.6 HP/s).

Temperature System

• Real annual temperature from embedded NASA climatology
• Cold climates + night + wet weather chill you faster
• Torches radiate heat nearby
• Campfire: burn 2 bag items → +8 warmth for duration

Combat

Player Weapons

• Melee: range 2.4m, base damage 5 + strength bonus
• Crit chance: 3% per agility point (max 50%)
• Kill streak: +0.5 attack per kill without taking damage (max x5)

Hostile Creatures (10 types)

Enemy	HP	Damage	Behaviour
Shade	8	1.5	Fast melee, combo strikes
Crawler	6	1.0	Fast melee, combo
Brute	26	4.5	Heavy slam, big knockback
Wraith	14	2.5	Lunge attacks
Frost Hound	12	2.0	Lunge, cold damage
Sand Reaper	10	2.0	Tail swipe
Stone Husk	22	4.0	Slam attacks
Mire Wisp	5	1.0	Fast melee
Gale	9	1.5	Ranged projectile
Volt Shrike	11	2.0	Ranged projectile
Gloom Tyrant	70	8.0	Boss: massive slam

Rarity Tiers

Tier	HP Mult	Damage Mult	Spawn Weight
Common	1.0×	1.0×	100
Rare	1.5×	1.3×	18
Ultra Rare	2.2×	1.8×	4
Mythic	3.5×	2.6×	1

RPG Progression

• XP curve: 30 + 25 × level^1.4 (snappy early, gentle wall endgame)
• Stat points: +1 per level (strength, vitality, agility)
• Prestige: Lv50+ → reset to Lv1 with permanent +5% damage, +8% XP, +5 max HP per tier

Crafting (NVCrafter)

• 5×5 crafting grid
• Recipe book showing all craftable outputs
• Weapons forged from hostile trophies (permanent, enchantable)
• Armour from trophies (passive defense + regen)
• Potions from foraged ingredients

Quest System

Guided progression chain with journal tracking:

• Explorer quests (visit biomes)
• Combat quests (defeat specific enemies)
• Crafting quests (forge weapons/armor)
• Boss quests (defeat Gloom Tyrant)