

Because I'm a massive EDF fan, here's a catch-all thread for discussions about Earth Defense Force / Chikyū Bōeigun (and might as well also cover Sandlot's lesser known games like Gigantic Drive / Robot Alchemic Drive)!
It's really impressive how well the PS2 era games have stood up to their later counterparts, evoking the same sense of scale when facing down hordes of monsters, albeit with more NPCs to flesh things out. The first games in the series I played were EDF Insect Armageddon (it's really bad) and EDF 2017/CB3, followed by 2025, 4.1, and 5. I then went and checked out the PS2 games afterwards and had a ton of fun with them. My thoughts on the games I've played are as follows, I'm curious to see what others thought of each game.
Monster Attack (eu) / Chikyū Bōeigun (jp):
I played the very generically named English release for this. Really fun, the only downside the game has is the framerate which at times takes a serious hit due to pushing the hardware to the limit, but remains very impressive for a a PS2 era game with its scale! EDF 2017, the third game, really does feel like a good reimagining of this one.
One thing I wondered he missions were really quiet due to the lack of NPCs and voice work; does the Japanese version have more mid-mission dialogue I wonder?
I was really impressed with the robot designs in this one! They felt pretty cool to tackle, even coming from EDF 2017 and 2025. Weapon selection wasn't bad either considering it was the first game and had fairly limited options compared to later games that flesh out Ranger weapon selection. The game is definitely easier than later ones in the series though, in part because no enemies have specific weakpoints you need to hit to damage them. All the major boss enemies can be hit anywhere to take them down.
Global Defence Force (eu) / Chikyū Bōeigun 2 (jp):
Only played a bit of this so far, but it feels like more of the same as the first PS2 game with new enemies and maps, so pretty good stuff! Having a second character class to play as along with double the weapons also really fleshes out the game, and it's interesting to see that they were every bit as crazy powerful as Wing Divers are in 2025 onward. I remember introducing some friends to EDF 4.1 and they wondered if it was cheating to play as a Wing Diver due to how mobile and powerful you were, and I'd have to explain that no, flying classes with crazy energy weapons have been around since the second game!
Edit: I've played this a lot more now including the Switch version, which is based on the PS Vita port and introduces the Air Raider. It's a very fun game, and the Air Raider works really well here even if you're playing solo offline since you have a ton of extremely powerful cannon strikes that are on time based reloads rather than needing kills to reload them. In EDF4 / 4.1, a missed shot with a cannon strike or other airstrike meant you had no way to reload it until your NPCs scored kills or you got kills with another weapon or vehicle, made them useful in multiplayer but risky or cumbersome solo. Here, even without vehicle summons Air Raider works amazingly well as you get some insanely strong airstrikes on reload timers, allowing you to rain down destruction without punishing you for missed shots (or because the random strikes fail to kill enough enemies to reload).
You do still get several point based reload strikes, and with 3 slots for weapons it's generally easy to take one along in a mission. The big howitzer strikes now require kills before you can use it rather than being ready to go at the mission start, obviously to balance how short some of the missions are and how easy they'd be if you could just nuke them immediately!
EDF 2 is by far the hardest game in the series so far. Armor gain per pickup is super low, and there aren't many good levels where you can rapidly gain armor and weapon boxes, so it takes a while to level any particular class up. Also, there's several very difficult boss fights, and the mirror shield enemies are a unique and lethal threat to deal with.
Earth Defense Force 2017 (na) / Chikyū Bōeigun 3 (jp)
The shift to the much more powerful Xbox 360 meant that the game could actually run at a decent framerate without too many issues aside from really enemy-dense maps. You also had a LOT of chatter from NPCs with you now, making it feel like a really lively game. Splitscreen co-op sadly didn't get mid-mission revival it seems until later games, but other than that it's a ton of fun and there's a huge variety of weapons to play with.
It's the last of the Japanese developed games that has automatic lock on missile weapons that fire and forget instead of needing you to manually lock on, which makes them really effective for run 'n gun tactics.
The last mission against the Mothership is an incredible visual spectacle the first time you experience it and really does a good job of evoking the desperate one man army feel the game goes for.
Earth Defense Force: Insect Armageddon (na)
My first exposure to the series. I thought it was pretty cool, but then I played the other games and learned the error of my ways. The only really positive thing I have to say about it is the controls for dodging are probably better than mapping dodge and jump to the same button. Also, the armor designs are very cool, and the lady doing the voice acting for ops is 10/10 quality. Turns out Parminder Nagra is a fairly major TV and Film actress, no idea how she got recruited to play a role in a budget game, but she nails it.
There's a LOT that's fundamentally broken about the game though, like a whole laundry list of major issues:
• Waypoint based mission structure. Instead of the freedom of a sandboxy open map with no objectives aside from survive and kill everything, you're constantly forced to run from Point A to Point B, minimizing how much you can freely explore and appreciate the map.
• Enemies are a lot smaller and faster. The hordes are also considerably less dense, and enemies spawn by just popping up around you, seemingly from random spots at times if you take a long time getting to the next waypoint. It makes it feel a bit like you're constantly picked away at while being surrounded on all sides.
• Anthills can't be destroyed by being shot at from afar. You HAVE to run up to them and lay an explosive charge... and the timer for setting it up is reset whenever you're hit by anything. The spawns from anthills can be temporarily slowed by shooting them, but they reopen super fast and will instantly spawn a wave of enemies after opening, meaning the only way to close them is to run in and risk hits while laying the explosive (or hope your NPCs cover you well enough to keep hits off you). It feels really sloppy, and also discourages long ranged combat as a tactical option since you're constantly railroaded through missions forced to deal with anthills up close.
• There's a measly 15 missions compared to the 40-50 the average game has. They all last a fairly long time, but a lot of it is running from one waypoint to the next, and the lack of any short, simple mission (mission 2 in most games) where you can go in to just test new weapons is annoying. There's "remixed" versions of the missions you can unlock and a survival mode, but the remixed versions just replace some enemy spawns with different spawn types. This tends to mean more ticks, which are probably the most annoying enemy in any EDF game due to how small they are and how damaging they tend to be.
• Map size varies tremendously but due to shield walls everywhere, it's usually much smaller and cramped compared to your average EDF game. There's several missions early on where your movement is heavily restricted, even compared to the average underground mission in EDF 2017.
• Sniper Rifles can't accurately be hip fired (some of the later ones the Jet gets might apparently improve this, but the ones from level 1 to 4 all appear to have awful aim unless using the zoom function).
• Grinding for the next upgrade and weapon tier eventually takes FOREVER and it feels like you're stuck with the same loadout for 10 maps in a row. You instantly level from 1 to 2 on your first mission, 2 to 3 isn't too bad, but 3 to 4 takes a fair bit of time with it only getting downright painful from there. You have to replay a ton of missions or skip ahead to another difficulty to hit level 5, the cap for Normal mode. Progression in late Normal, and later difficulties feels like it's at a snail's pace, meaning you're stuck with the same limited weapon pool for a very, very long time, instead of the constant, linear progression of new weapons as you work your way through the game.
• Random weapon drops from boss type enemies can be for any class, and are often inappropriate for your level. Every now and then you'll score a really useful one though, and there's several that are better than the ones you automatically get when going up a weapon tier.
• Your NPC allies are idiots and often will actively run into the corner of the map for no reason. I had this happen twice on my last playthrough, where instead of following me they insisted on hanging out in one spot until all the enemies wandered over and died. One time an NPC died INSIDE A WALL where I couldn't get to respawn in. Respawns heal back to FULL HEALTH so timing it so an NPC can respawn you actually seems to be a useful strategy in missions with low health drops. It also encourages silly strategies like deliberately killing a low health NPC just to respawn them at full health. Health pickups do heal your NPCs too as it does for Rangers in 4.1, but health items feel fewer and farther between.
• Wasps can grab you and their grab attack is 100% inescapable. You're totally reliant on an NPC to shoot it off you. The attack is mercifully rare, but if no NPC is near and alive to save you (or decides to fail miserably at crossing a bridge to get to you) you're gonna die as you can't mash out or shoot your way out of this grab. Apparently this happens even on the unlockable mode where you can play solo without NPCs! >w>
In summary, it's a bad EDF game and can be ignored entirely compared to the vastly superior EDF 2017 and EDF 2025. It's on Xbox 360 and PC, and the PC version has all the same issues, while offering EDF 4.1 and EDF 5 instead. Just play those, they're way better.
• Earth Defense Force 2025 (na) & EDF 4.1
Amazingly fun game. 4.1 is a remastered version with more NPCs in missions, heavily rebalanced weapons (particularly for Air Raider who has some major tweaks and nerfs in Limpet Snipers and Wireguns), improved mechanics for Rangers and Fencers (who can now roll through obstacles), and smooth 60 FPS framerate on PC, making for a really fun online or splitscreen experience.
The class system is amazing and the Fencer in particular is a lot of fun to dash around with and smash through enemies. Still retains the classic classes for use too, if you want the more mundane feel of the Ranger for instance.
2025's framerate on the Xbox 360 isn't great compared to 4.1 so you're not missing out on much by playing only 4.1, but I do like to revisit 2025's missions as they were pretty much all retooled in 4.1. Coop is a lot of fun too, and the revival system where you trade half your health to respawn an ally, but can't do so if your health is critical and flashing red (like 10% left) is a good system and makes for some fun, strategic cooperative play. It can be intense to be the last man standing in a team and manage to pick everyone back up and save the day!
• Earth Defense Force 5
The starting armor designs suck but mercifully you get proper armor a few missions into the game.

The game's great, has some amazing quality of life changes and all the classes are much more evenly balanced. Wing Diver is, however, noticeably more clunky to use with their charge up weaponry. Air Raider having a bunch of air strikes on reload timers rather than kill point based reloads makes them incredibly usable even in solo, something that first appeared in the PS Vita release of EDF2. The Fencer's changes make him even more crazy, and offers more freedom than heavily encouraging shield and spear as a default combo. Along with 4.1 and 2017 this is arguably the best in the series.
Useful websites (containing game and weapon data):
https://w.atwiki.jp/edf41/ (links to all the games are on the left bar, works well with Google Translate)
http://edfx.org/
EDF 4.1 Ranger Guide: https://steamcommunity.com/sharedfiles/ ... 1648464145
EDF 4.1 Air Raider Guide: https://steamcommunity.com/sharedfiles/ ... =780411292
EDF 4.1 Wing Diver Guide: https://steamcommunity.com/sharedfiles/ ... 1139318531
EDF 4.1 Fencer Guide: https://steamcommunity.com/sharedfiles/ ... =772665002