Survival is a game mode in which player(s) try to survive the increasingly stronger waves of enemies while trying to gain as many Volts as they can. This game mode is under heavy development, and as of Alpha v108, there are 5 playable levels. You can, however make your own survival levels using the ingame Level Editor. The first playable survival level was the Survival House.
Co-op Survival is where multiple players play at a time rather than one.
The game ends when all players have been eliminated. In Co-op, dead players will slowly re-spawn.
In survival mode the levels often have a protected spawn with lockable doors, but in certain levels the doors cannot be locked. Some levels (a la Desert) have no protected areas, thus leaving little time to buy and consider different weapons or items. Part of the difficulty of survival is that if the player doesn't act fairly quickly and often the enemies can build up and become virtually impossible to kill without being overwhelmed. A good solution to this is to toss some form of grenade or other throwable into the cluster and/or use an fully automatic or area-of-effect damage weapon.
Killing enemies and accessing hard to reach locations i.e. the top of a tower, results in the player gaining loot. After acquiring it, players can convert all the loot collected from killing enemies to Volts at the Volt Converter.
This will also increase your score.
 Buying Items
You can buy items with the Volts you collect to help you survive the increasingly difficult waves. There are various upgrades for each weapon, such as extended magazines.
Some levels are based on going back to the main hub where you spawn to purchase items, while others are more based on getting to specific areas in the map to get more advanced weapons and items. Some of these areas can be guarded or difficult to access.
 Video tutorial
- Player health option added v101 Alpha