[manwiththemachinegun]

I picked this up on STEAM over the holidays, desperate for an Armored Core/Ace Combat type action game, and was really pleaseently surprised. The game is fun, if simple, and the presentation is off the charts. For a indie-Thai developed game, they got some awesome voice actors and have done a ton of polish for a game that's still technically not done. Anyway, I've enjoyed it so far, hits all the right buttons.

https://www.youtube.com/watch?v=8AHjfICtl3w

[Spoon]

I tried this a while ago, I'd imagine quite a bit more development went into it since then. But when I played it back then, I found what was suppose to go for a story, to be a confusing affair.
But the devs have their hearts in the right place for sure.

[Akalabeth Angel]

I'd also recommend Strike Suit Zero if you never gave it a try.  It's fairly short and the NPCs are pretty light on character but pretty fun.

[Turambar]

I couldn't get into Strike Suit Zero, but War Tech Fighters is alright, and also a space-mech game.

http://store.steampowered.com/app/630030/War_Tech_Fighters/

[Mikes]

I'd also recommend Strike Suit Zero if you never gave it a try.  It's fairly short and the NPCs are pretty light on character but pretty fun.

Strike Suit Zero was incredibly awesome in a very pleasant old school kind of way.

[manwiththemachinegun]

There's also a PS4 version coming out being worked on by another studio which has drastically upped the polish:

https://www.youtube.com/watch?v=Ai6JXrvCRqY