At a glance
Monoeye UFO is the end-encounter reference for Mission 2 of Metal Slug 3. It is followed by Mission 3.
Mission numbers refer to the original campaign order. Boss names follow the community mission reference; they are encounter identifiers, not official stage titles.
Crash site and zombie outbreak
The second mission starts around an aircraft crash and a zombie outbreak. A side route enters a freezing Sasquatch cave, where the Elephant Slug can be found. The main advance reaches a meteorite investigation site and the Monoeye UFO.
The cave is an alternative section rather than a new numbered mission. The shift from the crash site to the research area is a useful landmark when learning where the closing encounter begins.
Campaign reference: Metal Slug Wiki’s mission overview. Practice suggestions below are our own.
React to your current state
Try this focused practice plan during your run. These are optional goals to set yourself, not extra objectives or achievements awarded by the game.
Watch your character after an unexpected hit or transformation.
Recheck your available movement before committing to the next dodge.
At the Monoeye UFO encounter, identify the transition that most often catches you off guard.
How do I reach Mission 2?
Progress through Mission 1 in Metal Slug 3 to reach this mission. A new arcade run begins at Mission 1.
The Play button selects this title in the collection. It does not launch this specific mission, change the original game’s difficulty or unlock later stages. Use the guides below to read ahead while your campaign follows its normal order.
Can I return to Mission 2 later?
In a solo session, pause and use Save State after reaching the point you want to revisit. Open the same title in the same browser and use Load State to restore a compatible saved point. Saving again replaces the previous saved point for that title; a link to this guide does not include your save.
Manual continues include free credits. Automatic continues can be changed in Options & Controls → Gameplay. Neither option is a mission selector. Read the save and continue guide.
Controls for this run
These are Classic keyboard defaults; saved bindings take precedence. Touch uses movement plus A / FIRE, B / JUMP and C / BOMB. Arrange touch controls before a long session, or see all controls.