Kill Otto twice in a level

Rescue 25 Comrades in a level

Destroy 3 Lifestars in a single level

Kill Otto three times in a level

Defeat the enemy homeworld of Venus

Defeat the enemy homeworld of Venus on Brutal skill level

Defeat the enemy homeworld of Venus in 2 player Co-Op mode

Get a Perfect award for kills in a single player challenging stage

Get a Perfect award for Comrades in any challenging stage

Destroy Otto using the blast from the Miner's destruction, or visa-versa.

Defeat the enemy Homeworld of Venus in the Veteran mission

Rescue 50 Comrades in a single level

Rescue 40 Comrades in a single level

Score 1 Million points

Score 2 Million points

Score 3 Million points

Defeat the enemy Homeworld of Venus at the Brutal skill level in the Veteran mission

Kill 3 standard enemies with 1 Supershot

Kill 5 standard enemies with 1 Supershot

Destroy a Lifestar with the Supershot

Get a comrade sucked into the Stargate