RiftExodus/specs/gameplay.md

Gameplay document

Description of Rift Exodus gameplay.

Overview

Roguelite inspired by FTL. You drive a vehicule along the equatorial rift. If you get out the temperate belt, you loose your run. You can find modules and ressources along the way to improve your vehicule and overcome obstacles you may encounter.

End of game

Loosing conditions

• Every pilot is dead
  • Extreme weather (out of temperal belt)
  • Bad event

Winning conditions

• End found
  • Underground city found
  • Space-ship found
  • etc.

Vehicule

Introduction

Your vehicule is highly modular. You can equip modules that you discover and harvest resources to fill your reservoirs up. Your vehicule configuration determines the amount of each resource you consume while moving, and can play a role in event appearance and / or outcome.

Resources

The most useful resource is mechanical energy which is needed to move your vehicule. Other resources can be harvest and stored by specific modules to this purpose.

• Mechanical energy : Consumed by movers to move the vehicule.
• Heat
• Cold
• Wood
• Water
• Gas
• Electricity
• Radioactivity

Modules

Each vehicule, depending on its size, has a maximum limit of number of modules.

Converter

These modules convert one or two types of resource to another.

• Piston engine : gas → mechanical energy
• Stirling engine : heat + cold → mechanical energy
• Electric motor : electricity → mechanical energy
• Furnace : wood → heat
• Evaporator : water → cold
• Atomic reactor : radioactivity → heat
• Refiner : wood + water → gas

Container

A container stores a specified type of resource.

• Heat : Magma storage
• Cold : Liquid azote container
• Wood : Chest
• Water : Water tank
• Gas : Gas reservoir
• Electricity : Battery
• Radioactivity : Radioactive container

Collecters

A collecter is used to harvest resources.

Time collecters

Collect resource everywhere, but require time to perform.

• Interchange : harvest heat or cold depending on weather
• Condenser : harvest water from air
• Solar panel : electricity

Biome collecters

Can fill up storage of a specific resource completely at once, but requires a specific biome.

• Magma collecter : magma from lava
• Cold collecter : cold from ice
• Saw : wood from forest
• Pump : water from water

Terraformer

Can modify types of map tiles.

• Drill : requires mechanical energy to transform mountain into plain
• Water canon : requires water to transform plain into water
• Magma canon : requires magma to transform water into mountain
• Freezer : requires cold to transform water into ice

Weapons

Can make damage during pursuits.

Movers

Consume mechanical energy to move the vehicule during exploration phase.

Wheel

Energy consumption : low Can cross water : no Can cross mountain : no

Caterpillar track

Energy consumption : medium Can cross water : no Can cross mountain : yes

Hover

Energy consumption : medium Can cross water : yes Can cross mountain : no

Propeller

Energy consumption : high Can cross water : yes Can cross mountain : yes

Class

Some vehicule categories.

Buggy

Tiniest vehicule to discover the game.

• 4 movers
• 3 slots

Discoverer

Small vehicule.

• 6 movers
• 6 slots

Cruiser

High class vehicule.

• 8 movers
• 12 slots

Cargo

Huge vehicule.

• 10 movers
• 24 slots

Exploration phase

Biomes

Desert

Flat and dry. More light for solar panels.

Plains

Flat and green.

Water

Difficult to cross.

Mountain

Difficult to cross. Give a extra bonus in visibility.

Forest

Slow down vehicules and reduce visibility range. Give opportunities to harvest bio resources.

Travel

The cost to cross a tile depend of the equipment of your vehicule.