Random Encounters

While playing Evolution: Battle for Utopia you'll come across random encounters.

Dominator Invasion
Dominators randomly show up on terraformed lands. You can choose to fight them with "Phoenix" missiles or "Hack" them with data disks playing a memory game. Once they show up you have 5mins to complete the encounter before it vanishes. They give Crystallite (90 to 100), a gem and Research data for Stasis shield.
Mine Capture
A "Viper" will capture your mine. Your choices are "Pay" her off or "Attack" her in combat to get your mine back in to production. She will stay at your mine until dealt with. (Viper does not appear until after you defeat her at the Elysium Cargo Ship?)
Overlord
A giant bug that wants nothing more than to overrun your base and wreck havoc. The bug will show up on the outskirts of your turrets giving you time to attack it before it charges you. You have 30mins to attack it before it charges your base; leaving your fingers and turrets to deal with it. The first time you beat the Overlord, you will recieve Crystallite and the Acid Pistol research data (Does not work on Android as Overloard does not show up on map before base attack). Following times the Overlord is known to be a normal larger enemy and are known to award you with: 6, 1, 1 or 1 Gem, with the former being most common. The Overlord is accompanied by small spiders, They drop nothing. If you successfully attack the Overlord before he charges your base, you will receive roughly 100 Crystallite and 1 Gem.
Base Attacks
Several creatures will advance upon and attempt to damage the player's buildings. These creatures will appear in the form of Spiders, Sliders or Bombers of varying types. Your turrets will fire upon the creatures automatically, although it is possible for some creatures to survive this attack. It is also possible for the player to tap on the creatures to deal damage. Multiple taps are often required to completely destroy a creature. Most creatures will drop 3 upon death, while some larger creatures are known to drop 6, 1, 1 or 1 Gem, with the former being most common. If a creature successfully reaches one of the player's buildings, the building will enter a "damaged" state, which must be repaired in order for the player to access it. Each building can be repaired at a cost of 10, 10, and requires 3 minutes to complete.
After opening the sector "crystallite deposit" you will be attacked very often and often with the bomber queen. She needs to be killed with many taps of your finger. These attacks completely stop when you kill her at the crystallite deposit. To be more precise: after killing her I got no further base attack... (except one attacking Overlord)
Itinerant Merchant
Stays 15 mins. You can trade with him or rob him. When you trade with him you can buy Magmatite or Iron 1:1 with Energy, Assault Rifle Cartridge 25 for 250 Energy, Data Disks 1 for 50 Energy or Crystallite 1 for 4 Energy. You can sell Iron or Magmatite 4:1 for Crystallite. And you can hack things (5 or 10 Reputation points). Reputation gives you a discount, for example 200 Reputation gives you 15%, 350 -> 20%, 500 -> 25%, 700 -> 30%, 1000 -> 35% (+3% on top with Jaafar). After obtaining more than 1000 Reputation it will be shown, but no further discount is applied. When you rob him you lose 50 Reputation, get some Materials and Ammo, a little Experience (2% at level 39, so you can reach level 40 even when you have an android device) and for the first robbery you get the research data for incendiary grenade g-1, for a second (or later) attack you get the research data for incendiary grenade g-1 kit.
Rebecca
Can be accessed through button above missions. Sells various weapons, resources or ammo for gems. May also have a mini game called Mole which costs 4 data disks and can be played up to 3 times oder 35 gems and can be played up to 4 times. Mole is a match 3 game with various resource awards, awarding anything from gems to medals depending on how well the player does in the game. When you play the expensive Mole game you can get up to 1 G3 Acid Grenade.
Anomalies
Anomalies appear in terraformed areas and give resources when collected. They appear 4 together on those areas affected. The resources given are biofuel, magmatite, steel or crystallite.