Complete all objectives in the first chapter.

Didn't let a single enemy reach the time machine throughout a level.

Completed a level with the time machine's health below 10 points.

Unlocked a tile for i-volve on any level.

Sold 10 weapons on a single level.

Placed all types of weaponry accessible in the episode on a single tile.

Installed weapons on all the tiles accessible on a level.

Complete a Round in Co-Op Without Either Player Taking Damage

Complete a Round with a Kills-per-minute rate of 100 or more

Survive to Round 5

Collect All Trophies

Help Your Country To Clear The Virus Infection